Abstract
A base for a play apparatus is disclosed, which includes: a container defining an internal volume and an opening providing access to the internal volume; a removable lid configured to cover the opening; and a securing means operable to secure the lid in place over the opening; where the securing means comprises a first part and a second part, the first part being fixedly attached to or integrally formed with the container and the second part being fixedly attached to or integrally formed with the lid, the first part and the second part being configured to engage directly with each other to secure the lid in place, in use, when the lid is placed over the opening.
Claims
1. A base for a play apparatus comprising: a container defining an internal volume and an opening providing access to the internal volume; a removable lid configured to cover the opening; and a securing means operable to secure the lid in place over the opening; wherein the securing means comprises a first part and a second part, the first part being fixedly attached to or integrally formed with the container and the second part being fixedly attached to or integrally formed with the lid, the first part and the second part being configured to engage directly with each other to secure the lid in place, in use, when the lid is placed over the opening.
2. Abase according to claim 1, wherein the action of moving the lid, relative to the container, towards a position at which the lid covers the opening is sufficient to cause the first part and the second part of the securing means to engage with each other.
3. A base according to claim 1, wherein the securing means is configured such that the force required to remove the lid from the container is greater than forces that may typically be exerted on the base during use of a game.
4. The base of claim 1, wherein the securing means is configured such that the force required for a user to secure the lid in place over the opening is lower than the force required for a user to remove the lid from the container.
5. The base of claim 1, wherein the securing means comprises only the first part and the second part, and the first part and the second part engage directly with each other through a snap fit connection.
6. The base of claim 1, wherein securing means is configured such that the lid is securable in place over the opening by a user exerting a downward force on the lid towards the container, and the lid is removable by exerting an upward force on the lid away from the container, wherein the upward force required to remove the lid from the container is greater than the downward force required to secure the lid in place over the opening.
7. (canceled)
8. The base of claim 1, wherein the first part of the securing means comprises a projection and the second part of the securing means comprises a groove configured to receive the projection.
9. The base of claim 8, wherein the groove is defined at least in part by two side walls, at least one of the side walls being resiliently biased to provide a snap fit between the container and the lid.
10. The base of claim 1, comprising one or more release tabs projecting in a direction away from a lower surface of the lid for removing the lid from the container.
11. The base of claim 10, comprising at least two release tabs projecting in a direction away from a lower surface of the lid for removing the lid from the container.
12. The base of claim 10, wherein the release tabs are located at regularly spaced points around the periphery of the lid.
13. The base of claim 10, wherein the lid comprises a ridge and the or one of the resiliently biased side walls comprises the ridge, wherein the ridge extends partially along one side of the lid and terminates before reaching one of the release tabs.
14. The base of claim 1, wherein the second part of the securing means comprises an edge of the lid and the first part of the securing means comprises a ledge or groove configured to accommodate the edge of the lid to provide a sliding fit between the container and the lid.
15. (canceled)
16. The base of claim 1, comprising a handle fixedly attached to or integrally formed with the container, wherein the handle is arranged over a recess formed in the container such that the handle does not protrude beyond the space.
17. (canceled)
18. The base of claim 1, comprising one or more feet projecting away from an external lower surface of the container, wherein the one or more feet are fixedly attached to or integrally formed with the external lower surface of the container.
19. (canceled)
20. The base of claim 1, comprising one or more recesses in the top of the lid configured to receive a lower portion of another one of the containers.
21. The base of claim 1, comprising one or more side feet projecting away from an external side surface of the container.
22. The base of claim 1, comprising an aperture located in an upper external surface of the lid for receiving ballast and a plug configured to close the aperture to prevent ballast from being expelled from the container in use, wherein the plug comprises a tab and the lid comprises a recess configured to receive the tab, and a length of the tab is less than a length of the recess.
23. (canceled)
24. The base of claim 1, wherein the lid comprises an aperture for receiving a pole of a play apparatus for a tetherball game, and the lid comprises: one or more projections extending away from an upper external surface of the lid and extending around the circumference of the aperture; and/or one or more projections extending away from an upper internal surface of the lid and extending around the circumference of the aperture; and/or the lid is thicker in a region near the aperture of the lid through which the pole extends in use.
25. A play apparatus comprising: a base according to claim 1; and a pole, a lower end of the pole being connected to the base.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0286] Embodiments will now be described, by way of example only, with reference to the accompanying drawings, in which:
[0287] FIG. 1 shows a base for a play apparatus according to an embodiment;
[0288] FIG. 2 shows three containers of the base of FIG. 1 in a stacked configuration;
[0289] FIG. 3 shows three lids of the base of FIG. 1 in a stacked configuration;
[0290] FIG. 4 shows a close-up of a portion of the lid of FIG. 1;
[0291] FIG. 5a shows a schematic cross-sectional side view of the base of FIG. 1, showing a first position of the lid relative to the container;
[0292] FIG. 5b shows a schematic cross-sectional side view of the base of FIG. 1, showing a second position of the lid relative to the container;
[0293] FIG. 5c shows a schematic cross-sectional side view of the base of FIG. 1, showing a third position of the lid relative to the container;
[0294] FIG. 6a shows a schematic close-up cross-sectional side view of a portion of a base according to another embodiment;
[0295] FIG. 6b shows a further schematic close-up cross-sectional side view of a portion of the base of FIG. 6a;
[0296] FIG. 7a shows schematically a cross-sectional view of a base for a play apparatus according to another embodiment;
[0297] FIG. 7b shows schematically a cross-sectional view of a container of the base of FIG. 7a;
[0298] FIG. 8a shows schematically a cross-sectional view of a base for a play apparatus according to another embodiment;
[0299] FIG. 8b shows schematically a cross-sectional view of a container of the base of FIG. 8a;
[0300] FIG. 9 shows a further view of the base of FIG. 1;
[0301] FIG. 10 shows a further view of the base of FIG. 1;
[0302] FIG. 11 shows three of the bases of FIG. 1 in a stacked configuration;
[0303] FIG. 12 shows a further view of the base of FIG. 1;
[0304] FIG. 13 shows a further view of the base of FIG. 1;
[0305] FIG. 14 shows a base for a play apparatus according to another embodiment;
[0306] FIG. 15 shows a further view of the base of FIG. 12;
[0307] FIG. 16 shows a further view of the base of FIG. 12; and
[0308] FIG. 17 shows a play apparatus for a tetherball game.
DETAILED DESCRIPTION
[0309] FIG. 1 shows a base 10 for a play apparatus, e.g. a base for a tetherball game, such as Swingball®. The base 10 comprises a container 1 and a removable lid 2. The lid 2 comprises an aperture 3 located substantially in the centre of the lid 2. In use, the lid 2 is secured in place on the container 1 (as shown in FIG. 1) and a pole (not shown) may be inserted in to the aperture 3. An inner bottom surface of the container 1 comprises a receiving formation comprising a socket (not shown). The pole may extend through the aperture 3 and a first end of the pole may be received in the socket. When the play apparatus is used for a tetherball game, a ball (not shown) may be arranged to swing about the pole by means of a flexible cord (not shown) supported proximate to a second end of the pole, opposite the first end. It will be appreciated by those skilled in the art that the disclosure is applicable to any suitable play apparatus for a tetherball game and to play apparatuses other than play apparatuses for tetherball games.
[0310] FIG. 2 shows three of the containers 1 in a stacked arrangement. The main body of the container 1 comprises a bottom panel 18 and a continuous side wall 19 upstanding from the bottom panel 18. The container 1 further comprises a projection 11 which extends outwardly away from the continuous side wall 19 and extends around the circumference of the container 1. The projection 11 is located relatively close to a top edge of the continuous side wall 19. The container 1, including the bottom panel 18, the continuous side wall 19, and the projection 11 are all integrally formed as a single part, typically by any suitable plastic moulding technique.
[0311] As can be seen in FIG. 2, the container 1 defines an internal volume and has an open top. The internal volume may be utilised to store other parts of the play apparatus, such as, in the example case of a tetherball apparatus for a tether tennis game, the pole in a collapsed configuration, the flexible cord and the ball, and a set of bats. The lid 2 is configured to close the opening of the container 1 such that the other parts of the tetherball game can be stored within the base 10 when not in use. The container 1 may also be utilised to receive ballast, such as water, sand, gravel, stones or rocks, in order to secure the base 10 in position when the play apparatus is in use, e.g. when the play apparatus is being used to play a tetherball game.
[0312] FIG. 3 shows three of the lids 2 in a stacked arrangement, in which the underside of the top-most lid 2 is visible. The lid 2 is generally rectangular and comprises two release tabs 22 located at diagonally opposing corners. Each release tab 22 comprises a middle portion 221 which is flanked on either side by first and second wing portions 222a, 222b. The lid 2 comprises a panel 23 and a skirt 24 which extends from the panel. As shown in FIG. 3, the lid 2 comprises an annular projection 31 extending away from the underside of the panel 23 and extending around the circumference of the aperture 3. This aids in supporting the pole of the tetherball game in use. It may also locally increase the rigidity and/or strength of the lid, which may make the lid less prone to being damaged during play.
[0313] FIG. 4 shows a close-up of the top-most lid 2 of FIG. 3 in the region of one of the release tabs 22. The skirt 24 comprises a first portion 241 and a second portion 242. The skirt 24 further comprises a plurality of struts 243 which extend between the panel 23 and the first portion 241 of the skirt 24. The struts 243 reinforce the first portion 241 of the skirt 24 against the panel 23. The second portion 242 extends from the first portion 241. The second portion 242 is thinner than the first portion 241. On an inner side of the lid 2 there is a step where the first portion 241 joins the second portion 232. The skirt 24 comprises four discrete ridges 25. Each of the ridges 25 extends along one of the four sides of the lid 2, terminating before the release tabs 22 of the lid 2. Each ridge 25 extends inwardly of the lid 2 from the second portion 242 of the skirt 24. On each of the four sides of the lid 2, a groove 21 is defined between each ridge 25 and the step where the first portion 241 joins the second portion 242. The lid 2, including the panel 23, the first and second portions 241, 242 of the skirt 24, the struts 243, and the ridge 25 are all integrally formed as a single part, typically by any suitable plastic moulding technique.
[0314] FIGS. 5a-c shows schematically a cross-sectional side view of the lid 2 and the container 1. For clarity, only the features on one side of the base 10 have been labelled. The base 10 comprises a securing means operable to releasably secure the lid 2 to the container 1. The securing means comprises a container portion comprising the projection 11, and a lid portion comprising the groove 21. As shown in FIGS. 5a-c, the second portion 242 of the skirt 24 is thinner than the first portion 241 of the skirt 24. As such, the second portion 242 is more flexible in the horizontal direction as shown in FIGS. 5a-c than the first portion 241. When a force is applied to the release tab 22 outwardly of the base 10 in the horizontal direction as shown in FIGS. 5a-c, this force is transmitted to the first portion 242 and in turn to the first portion 241. The thickness of the second portion 242 relative to the first portion 241 and the struts 243 will provide an opposing force to the force applied to the first portion 241. As such, the first portion 241 will move outwardly relative to the second portion 242.
[0315] In order to secure the lid 2 to the container 1, the lid 2 is first placed on to the container 1 such that the release tabs 22 overlap the projection 11 and the walls 25 rest on the projection 11 as shown in FIG. 5b. In this position, the release tabs 22 and the projection 11 will inhibit any lateral movement of the lid 2 relative to the container. A downward force in the vertical direction as shown in FIGS. 5a-c is then applied to the lid 2 by a user. As shown in FIGS. 5a-c, the projection 11 may comprise a chamfer. As a result of the downward force and the chamfer of the projection 11, a resulting outward force in the horizontal direction as shown in FIGS. 5a-c is exerted on the second portion 242. This moves the second portion 242 outwards, and with it the ridge 25 moves downwards and outwards. Continued application of the downward force on the lid 2 will cause the ridge 25 to continue to move downwards and outwards until the projection 11 is able to pass the ridge 25 to become seated in the groove 21. The projection 11 is then retained in the groove 21 until the lid 2 is required to be removed from the container 1.
[0316] When the lid 2 is on the container 1, the middle portion 221 of the release tab 22 is maintained at a distance from the container 1 by the first and second wing portions 222a, 222b. This provides a gap between the release tab 22 and the container 1, enclosed by the first and second wing portions 222a, 222b, which enables a user to grip the inward facing surface of the middle portion 221 of the release tab 22. In order to release the lid 2 from the container, a force is applied by a user on the inward facing surface of the middle portion 221 of the release tab 22. This force causes the first portion 241 of the skirt 24 proximate the release tab 22 to move outwardly relative to the second portion 242, and with it an end of the ridge 25 proximate the release tab 22 moves downwards and outwards. This allows a portion of the projection 11 to pass the end of the ridge 25. An upward force is then applied to the lid 2, by pulling up on the release tab 22. This causes the portion of the projection 11 to pass the end of the ridge 25. Continued upward pulling on the release tab 22 causes the remainder of the projection 11 to pass the ridge 25 until the lid can be removed from the container 1.
[0317] FIGS. 6a and 6b show schematic close-up cross-sectional side views of a portion of a corner of a lid 2′ and a portion of a corner of a container 1′ according to an alternative embodiment of the disclosure. In the embodiment of FIG. 6, an upper edge of the container 1′ comprises a lip 110 configured to be retained within a groove 21′ to provide a snap fit between the lid 2′ and the container 1′. The groove 21′ comprises a neck portion defined by first and second opposing walls 211a, 211b, and a lip-receiving portion 212. The diameter of the lip-receiving portion 212 is greater than the distance between the first and second opposing walls 211a, 211b at the neck portion. The walls 211a, 211b are resiliently biased towards each other. This biasing force is provided by the inherent resilience of the material used to form the lid 2′.
[0318] The lid 2′ comprises a release tab 22′ comprising a middle portion 221′ which is flanked on either side by first and second wing portions 222a′, 222b′. In the cross-sections of FIGS. 6a and 6b, the first wing portion 222a′ is visible. The lip 110 and the lip-receiving portion 212 extend around the periphery of the container 1′ and lid 2′, respectively, only in the region of the release tab 22′. In an alternative embodiment, the lip 110 and the lip-receiving portion 212 extend continuously around the entire periphery of the container 1′ and lid 2′ respectively.
[0319] In order to release the lid 2′ from the container 1′, a force is applied by a user on the inward facing surface of the middle portion 221′ of the release tab 22′ proximate an end 223 of the release tab 22′ that is distal from the groove 21′. This force provides a moment at the groove 21′ to overcome the biasing force between the walls 211a, 211b. This increases the distance between the first and second opposing walls 211a, 211b at the neck portion, allowing the lip 110 to pass through the neck portion and enabling the upper edge of the container 1′ to be removed from the groove 21′. To secure the lid 2′ on the container 1′, the groove 21′ and the upper edge of the container 1′ are aligned and a downward force is exerted on the lid 2′. This causes the lip 110 to force the walls 211a, 221b of the groove 21′ apart to enable the lip 110 to pass through the neck portion and be received within the lip-receiving portion 212. Once the lip 110 is fully seated in the lip-receiving portion 212, the biasing force between the walls 211a, 221b reduces the distance between the walls 211a, 221b to retain the lip 110 within the lip-receiving portion 212. The biasing force between the walls 211a, 221b is sufficient to resist lateral forces on the lid 2′ in use, in the absence of a moment being applied to the groove 21′ by means of the release tab 22′, so as to ensure the lid 2′ remains secured to the container 1′.
[0320] In the embodiments of FIGS. 5 and 6, the lid 2, 2′ comprises two release tabs 22, 22′ located at diagonally opposed corners of the lid. In an alternative embodiment, the lid 2, 2′ may comprise four release tabs 22, 22′, each release tab 22, 22′ being located at a different corner of the lid 2, 2′.
[0321] In another example embodiment (not illustrated), the container portion of the securing means comprises a lip formed at an upper edge of a container. A lid comprises a downwardly-facing groove defined by two opposing walls. The groove and the lip have corresponding cross-sections, with the distance between the two opposing walls being less than the diameter of the lip when the lid is not secured to the container. Unlike the embodiment of FIGS. 6a and 6b, the groove 21″ does not comprise a separate neck portion and lip-receiving portion. To secure the lid on the container, the groove and the lip are aligned and a downward force is exerted on the lid, causing the lip to force the walls of the groove apart. Once the lip is fully received in the groove, the biasing force between the walls retains the lip within the groove.
[0322] FIGS. 7a and 7b shows schematically a cross-sectional end view of a base 20 for a play apparatus. The base 20 has features in common with the base 10, and like reference numerals will be used to indicate like features. In the embodiment of FIGS. 7a and 7b, the lid portion of the securing means comprises an edge 201 of the lid 2. The container portion of the securing means comprises a ledge 101 which is configured to support the edge 201 of the lid 2. FIG. 7b shows the container 1 of the base 20 of FIG. 7a, and shows the ledge 101 in more detail. The container portion of the securing means further comprises a wall 12 which is configured to inhibit lateral movement of the lid 2 in use. The ledge 101 and the wall 12 extend continuously around the periphery of the container 1. Alternatively, the ledge 101 and the wall 12 may extend discontinuously around at least a portion of the periphery of the container 1.
[0323] In some alternative embodiments, the ledge 101 does not extend continuously around the periphery of the container 1. In some alternative embodiments, the container 1 comprises two ledges 101, extending along a portion of the length of opposing internal side walls of the container 1. In some other alternative embodiments, the base 20 comprises a ledge 101 extending along a portion of the length of each of the internal side walls of the container 1. In some alternative embodiments, the wall 12 does not extend continuously around the periphery of the container 1. In some embodiments, the wall 12 may extends along three of the four sides of the container 1 to provide an opening extending along a side of the container. This may allow the lid 1 to be slid in to position from the opening and along the ledge 101 or ledges 101 extending perpendicularly to the opening.
[0324] FIG. 8a shows schematically a cross-sectional end view of a base 30 for a tetherball game according to another embodiment of the disclosure. The base 30 has features in common with the base 10, and like reference numerals will be used to indicate like features. In the embodiment of FIG. 8a, the lid portion of the securing means comprises an edge 281 of the lid 2. The container portion of the securing means comprises a groove 181 which is configured to support the edge 281 of the lid 2. FIG. 8b shows the container 1 of the base 30 of FIG. 8a, and shows the groove 181 in more detail. The groove 181 extends continuously around the periphery of the container 1, apart from at an opening along one side of the container 1. The opening is configured to receive the lid 2, such that the lid 2 can be slid along the groove 181 in to position.
[0325] The lid 2 of base 20, 30 (FIGS. 7a, 7b; 8a, 8b) comprises a handle (not shown) to facilitate easy removal of the lid 2 from the container 1. The handle allows the lid 2 of the base 20 of FIGS. 7a and 7b to be easily lifted away from the ledge 101 of the container 1. The handle allows the lid 2 of base 30 of FIGS. 8a and 8b to be slid along the groove 181 and out of the opening. The handle is integrally formed with the lid 2; however in an alternative embodiment the handle may be formed as a separate part and may be joined to the lid 2 by any suitable means.
[0326] FIG. 9 shows a further view of the base 10 of FIG. 1. As shown in FIG. 9, the container 1 comprises an integrally formed handle 13 arranged over a recess formed in the body of the container 1. The handle 13 allows the base 10 to be easily transported when the lid 2 is secured on the container 1, and allows the container 1 alone to be easily transported when separated from the lid 2. Although the handle 13 has been described with reference to the embodiment of FIG. 1, the handle 13 is also applicable to the embodiments of FIGS. 7 and 8.
[0327] FIG. 10 shows a further view of the base 10 of FIG. 1. In FIG. 10, the underside of the container 1 and an external lower surface of the container 1 can be seen. The container 1 comprises four feet 14 projecting away from the external lower surface. Each of the four feet 14 is located in a different corner of the base 10 and is configured to contact the ground when the base 10 is in use. In an alternative embodiment, the container 1 may comprise, for example, two feet which extend along the length of opposing edges of the external lower surface.
[0328] FIG. 11 shows three of the bases 10 of FIG. 1 in a stacked configuration. As can be seen from the top-most base 10 in FIG. 11, the lid 2 comprises a recess 15 in the top of the lid 2. The recess 15 is configured to receive the feet 14 of the container 1 of another base 10 such that multiple bases 10 can be stacked as shown in FIG. 11. The recess 15 is defined by a continuous wall which inhibits movement of the feet 14 of another base 10 when multiple bases 10 are stacked. In an alternative embodiment, instead of a single recess 15 in the top of the lid 2, the lid 2 may comprise a plurality of recesses in the top of the lid 2. Each of the plurality of recesses is configured to receive one of the feet 14.
[0329] Although the feet 14 and the recess 15 have been described with reference to the embodiment of FIG. 1, the feet 14 and the recess 15 are also applicable to the embodiments of FIGS. 7 and 8.
[0330] FIG. 12 shows a further view of the base 10 of FIG. 1. As shown in FIG. 12, the base 10 comprises two side feet 16 projecting from an external side surface of the container. The side feet 16 enable the base 10 to be stored stably in an upright position with the feet 16 in contact with the ground. This may be particularly beneficial when displaying the base at a point of sale, or when storing the base in an area with limited space. Although side feet 16 have been described with reference to the embodiment of FIG. 1, the side feet 16 are also applicable to the embodiments of FIGS. 7 and 8.
[0331] FIG. 13 shows a plan view of the lid 2 of the base 10 of FIG. 1, in which the recess 15 and the aperture 3 are visible.
[0332] FIG. 14 shows another example of a base for a play apparatus. The base 40 has features in common with the base 10, and like reference numerals will be used to indicate like features. The lid 2 of the base 40 comprises an aperture (not shown) in an upper external surface of the lid for receiving ballast, such as water, when the lid is secured to the container. This removes the need for the lid 2 to be removed should the container 1 be required to be filled with ballast. The base 40 further comprises a plug 17 configured to close the aperture. In FIG. 14, the plug 17 is shown in position closing the aperture.
[0333] As shown in FIG. 14, the lid 2 comprises an annular projection 32 extending away from the upper external surface of the lid 2 and extending around the circumference of the aperture 3. The annular projection 32 provides a locating feature for a pole of tetherball game and, in combination with the annular projection 31, provides a sleeve for aiding support of the pole in use. Although the annular projection 32 is described with reference to the embodiment of FIG. 14, the annular projection 32 is also applicable to embodiments of FIGS. 1, 7 and 8.
[0334] FIG. 15 shows a close-up view of the base 40 of FIG. 14 in the region of the plug 17. As shown in FIG. 15, the plug 17 comprises a tab 171 and the lid 2 comprises a recess 23 configured to receive the tab 171. A length of the tab 171, as measured from where the tab 171 extends from the main body of the plug 17, is less than a length of the recess 23, measured in the same direction as the length of the tab 171. This provides a gap between the end of the tab 171 and the end of the recess 23. A user is able to place one of their fingers into the gap to grip the end of the tab 171 and lift the tab 171 away from the lid 2. The user can then grip the tab 171 with two or more fingers to lift the plug 17 away from the aperture. Easy removal of the plug 17 from the aperture is therefore facilitated by the provision of the gap between the end of the tab 171 and the end of the recess 23.
[0335] FIG. 16 shows a plan view of the lid 2 of the base 30 of FIG. 14, in which the plug 17 is visible. Although the aperture and the plug 17 have been described with reference to the embodiment of FIG. 1, the aperture and the plug 17 are also applicable to other embodiments, including the embodiments of FIGS. 7 and 8.
[0336] FIG. 17 shows an example of a play apparatus 140 for a tetherball game. The play apparatus 140 includes the base 10. Alternatively, the base may be any other base according to the present disclosure, e.g. the base 20, the base 30 or the base 40.
[0337] A pole 148 is attached to the base 10 at a lower end. At an upper end of the pole 148, there is a head 143. In the illustrated example, the pole 148 is made up of four pole sections 141 that are screwed together at connection portions 142.
[0338] A loop 145 at an end of a cord 144 connects the cord 145 to the head 143. A ball 146 is attached to the free end of the cord 144. The ball 146 may be a sponge, rubber or plastic ball, or a tennis ball.
[0339] The play apparatus 140 may be provided with one or more bats (not shown). One or more users may use the play apparatus 140 to play a tether tennis game.
[0340] In use, the ball 146 is struck with a bat causing the cord 144 to exert torque on the pole 148. This torque is in turn transmitted to the lid of the base 10. In some implementations, this torque may be in the region of 295 Nm. The securing means of the base is therefore required to resist this torque to prevent the lid from becoming detached from the container in use. The container of the base is required to receive and contain a suitable amount of ballast, such as water or sand, to inhibit the play apparatus 140 from toppling over as a result of forces exerted on the play apparatus 140 in use.
[0341] When disassembled, the parts of the pole 148, the head 143, the cord 144, the ball 146 and, if provided, the bat(s) may be stored within the base 10.
[0342] In example implementations, the lid may be formed of a plastics material. The lid may have a minimum thickness of at least 1.5 mm. The lid may have a minimum thickness of at least 2 mm. The lid may have a minimum thickness of around 2 mm.
[0343] It will be understood that various modifications and improvements can be made without departing from the concepts disclosed herein. Except where mutually exclusive, any of the features may be employed separately or in combination with any other features and the disclosure extends to all combinations and sub-combinations of one or more features disclosed herein.
