US Patent 7490740 Personal hydration system

A personal hydration assembly is configured to deliver fluid to a user. The assembly includes a reservoir having a shell defining a volume configured to contain a quantity of fluid. A holder is configured to interconnect the shell and the user. A fluid delivery system is coupled to the shell and is configured to transport fluid from the reservoir to the user. The shell is configured to resist deformation and maintain a first shape when fluid is stored within the shell. The shell is configured to permit deformation into a second shape to reduce the volume when fluid is transported from the shell to the user.