A container assembly for flowable materials, the container assembly comprising: a reusable outer supporting container; and a disposable inner plastic liner; wherein the reusable outer supporting container comprises an outlet pipe comprising a first outlet pipe section connected to the reusable outer supporting container and a second outlet pipe section releasably connectable to the first outlet pipe section, wherein the second outlet pipe section comprises a valve for selectively closing off the second outlet pipe section, and wherein at least one of the first outlet pipe section and the second outlet pipe section comprises an annular recess; and wherein the disposable inner plastic liner comprises a tubular outlet portion, wherein the tubular outlet portion comprises an outer flange configured to be captured between the first outlet pipe section and the second outlet pipe section, and further wherein the outer flange of the tubular outlet portion comprises an annular protrusion configured to be received in the annular recess when the outer flange is captured between the first outlet pipe section and the second outlet pipe section.

A subsea fluid storage system comprising a soft bladder disposed within a pressure balanced reservoir, a rotatable piston, and a piston rotator which rotates and twists the rotatable piston as it travels along a predetermined axis within the pressure balanced reservoir, predictably and repeatabley collapses the soft bladder when the rotating piston cooperatively travels about the piston rotator, twisting the soft bladder as the rotating piston moves along the predetermined axis, collapsing the bladder inward and thereby emptying the bladder of fluid within the bladder. The piston's rotation pulls the soft bladder away from the pressure balanced reservoir's interior, thereby preventing the bladder's binding or pinching the pressure balanced reservoir's interior. In configurations, fluid is allowed to enter the pressure balanced reservoir via a valve until a balance is achieved between an interior and an exterior of the pressure balanced reservoir.

A subsea fluid storage system comprising a soft bladder disposed within a pressure balanced reservoir, a rotatable piston, and a piston rotator which rotates and twists the rotatable piston as it travels along a predetermined axis within the pressure balanced reservoir, predictably and repeatabley collapses the soft bladder when the rotating piston cooperatively travels about the piston rotator, twisting the soft bladder as the rotating piston moves along the predetermined axis, collapsing the bladder inward and thereby emptying the bladder of fluid within the bladder. The piston's rotation pulls the soft bladder away from the pressure balanced reservoir's interior, thereby preventing the bladder's binding or pinching the pressure balanced reservoir's interior. In configurations, fluid is allowed to enter the pressure balanced reservoir via a valve until a balance is achieved between an interior and an exterior of the pressure balanced reservoir.

Using a subsea fluid storage system 1 comprising a soft bladder (20) disposed within a pressure balanced reservoir (10), a rotatable piston (30) disposed at least partially within the pressure balanced reservoir where a top of the soft bladder is in communication with the rotatable piston, and a piston rotator (50) operative to rotate and twist the rotatable piston as the rotatable piston travels along a predetermined axis within the pressure balanced reservoir, a predictable and repeatable collapse of the soft bladder may be obtained by allowing the rotating piston (30) to cooperatively travel about the piston rotator (50) to twist the soft bladder (20) as the rotating piston moves along the predetermined axis in such a manner as to collapse the bladder inward, thereby emptying the bladder of fluid within the bladder. The rotation of the piston pulls the soft bladder away from an interior of the pressure balanced reservoir, thereby preventing binding or pinching of the bladder with respect to the interior of the pressure balanced reservoir. In configurations, fluid is allowed to enter the pressure balanced reservoir via a valve (54) until a balance is achieved between an interior and an exterior of the pressure balanced reservoir.

A barrel with access mechanism is a device by which bulk products and materials are more easily accessed and removed from large drum containers. The device provides the drum with an inner plastic liner. The liner would be made available in two formats. The first, used with liquids, fine powders and the like, would be made of an accordion like side material that collapses upon itself. The second version, used for larger bulk materials, would consist of two overlapping side liners that slide over one other. In both cases, as the material in the barrel is consumed or removed, the bottom of the barrel raises up so that material on the bottom can be more easily removed, even by those who are small in stature. The device is equipped with a motor that drives at least two threaded rods, synchronized together, which raise and lower the bottom. The device can be driven by 120 VAC or 12 VDC. At any time or when the material is completely removed, the bottom can be lowered allowing the barrel to be refilled.

A barrel with access mechanism is a device by which bulk products and materials are more easily accessed and removed from large drum containers. The device provides the drum with an inner plastic liner. The liner would be made available in two formats. The first, used with liquids, fine powders and the like, would be made of an accordion like side material that collapses upon itself. The second version, used for larger bulk materials, would consist of two overlapping side liners that slide over one other. In both cases, as the material in the barrel is consumed or removed, the bottom of the barrel raises up so that material on the bottom can be more easily removed, even by those who are small in stature. The device is equipped with a motor that drives at least two threaded rods, synchronized together, which raise and lower the bottom. The device can be driven by 120 VAC or 12 VDC. At any time or when the material is completely removed, the bottom can be lowered allowing the barrel to be refilled.