Patent attributes
A handheld drinking vessel with a compressible bladder, inlet and outlet members, an inlet valve to allow liquid to flow into the bladder, and an outlet valve to allow liquid to flow from the bladder whereby liquid can be exhausted by a compression of the bladder and liquid can be drawn into the bladder by a decompression of the bladder. The inlet and outlet valves can comprise one-way valves. First and second straps can enable an exertion of an expansion force on the bladder. A skeleton structure can bias the bladder to compressed or non-compressed configurations. First and second side walls of the bladder can pivot about an axis to allow the bladder to achieve a substantially flat configuration. The bladder, which can be formed from a thin film material, can be selectively retained adjacent to a wrist of a user by a strap and a wrist engaging member.
