The invention relates to a biodegradable stopper comprising a casing of rigid biodegradable material, consisting of an annular body with a covered flank, and an internal ring of biodegradable elastic material the total width of which is equal to or smaller than the internal width of the annular body, comprising one or more internal recesses in which one or more portions of the ring fit.

A disposable, non-toxic, biodegradable, flexible cover fitting on beverage containers to protect from unwanted contamination or spillage.

A disposable, non-toxic, biodegradable, flexible cover fitting on beverage containers to protect from unwanted contamination or spillage.

A drink spiking prevention device includes a hair accessory and a cover. The hair accessory having a band forming a circle and the band being elastic. The hair accessory further having a hair accessory fabric forming a tube that encapsulates the elastic band and a pouch coupled to the hair accessory fabric. The cover is stored in and removeable from the pouch. The cover includes a cover fabric that extends to a perimeter, an aperture formed in the cover fabric, and a cord extending from the perimeter and coupled to the hair accessory. The cover covers an opening of a cup by the perimeter stretching over and conforming to a diameter of the opening to prevent new material from being added to a liquid in the cup.

A drink spiking prevention device includes a hair accessory and a cover. The hair accessory having a band forming a circle and the band being elastic. The hair accessory further having a hair accessory fabric forming a tube that encapsulates the elastic band and a pouch coupled to the hair accessory fabric. The cover is stored in and removeable from the pouch. The cover includes a cover fabric that extends to a perimeter, an aperture formed in the cover fabric, and a cord extending from the perimeter and coupled to the hair accessory. The cover covers an opening of a cup by the perimeter stretching over and conforming to a diameter of the opening to prevent new material from being added to a liquid in the cup.

Various implementations include a container system that includes a first and second bowl. The first bowl has a resilient wall that is urgable radially outwardly from a resting position to an expanded position. The edge of the resilient wall spaced apart from a first bowl base has a resting perimeter length and an expanded perimeter length. A rigid wall of the second bowl has a first edge spaced apart from a second bowl base and a second edge opposite the rigid wall first edge each have a perimeter length. The perimeter lengths of the rigid wall are both greater than or equal to the resting perimeter length and are less than or equal to the expanded perimeter length. A groove is defined by the resilient wall and/or rigid wall. A protrusion extends along the other of the rigid wall and/or resilient wall. The protrusion is engageable within the groove.

A disposable, non-toxic, biodegradable, flexible cover fitting on beverage containers to protect from unwanted contamination or spillage is described. In one embodiment, the invention provides a cover for a drink container, the cover comprising: a flexible body having a substantially flat, circular shape; a bead disposed about a circumference of the flexible body; and an indicator visible on at least one surface of the body at which a puncture through the body may be made.

A disposable, non-toxic, biodegradable, flexible cover fitting on beverage containers to protect from unwanted contamination or spillage is described. In one embodiment, the invention provides a cover for a drink container, the cover comprising: a flexible body having a substantially flat, circular shape; a bead disposed about a circumference of the flexible body; and an indicator visible on at least one surface of the body at which a puncture through the body may be made.

A beverage system is provided that includes a cup having a frustoconical wall extending from a first end to a second end. The first end is coupled to a bottom wall and the second end defines a rim. Inner surfaces of the walls define a cavity. The rim defines an opening that is in communication with the cavity. A lid is coupled to the rim such that the lid covers at least a portion of the opening. A sleeve includes a collar that surrounds a portion of the frustoconical wall. The sleeve includes first and second arms. The arms each include a first end coupled to the collar and an opposite second end. The second end of the first arm directly engages the lid. The second end of the second arm directly engages the second end of the first arm when the second end of the first arm directly engages the lid to prevent the lid from being removed from the cup.

A beverage system is provided that includes a cup having a frustoconical wall extending from a first end to a second end. The first end is coupled to a bottom wall and the second end defines a rim. Inner surfaces of the walls define a cavity. The rim defines an opening that is in communication with the cavity. A lid is coupled to the rim such that the lid covers at least a portion of the opening. A sleeve includes a collar that surrounds a portion of the frustoconical wall. The sleeve includes first and second arms. The arms each include a first end coupled to the collar and an opposite second end. The second end of the first arm directly engages the lid. The second end of the second arm directly engages the second end of the first arm when the second end of the first arm directly engages the lid to prevent the lid from being removed from the cup.