Abstract: A disposable charging label according to various aspects of the present technology may comprise a thin light-weight flexible wireless charging device. The disposable charging label may comprise a pre-charged battery device and a planar coil that can be used to charge the battery of a second device positioned adjacent to the planar coil. The disposable charging label may be configured to be temporarily attached to the second device during the charging process to allow hands free operation.

Abstract: A water bladder system. An air valve, which may be a check valve, is configured to be coupled with the flexible container and selectively allow air to enter an interior of the flexible container. A release mechanism coupled with the flexible container selectively allows the fluid to exit the interior of the flexible container. An open-celled foam is included within the interior of the flexible container and is coated with a quaternary organosilane coating produced from a quaternary ammonium organosilane reagent.