Patent attributes
Disclosed herein are fluid bladders that include a port and a port closure, a handle, and/or other components. Some disclosed closures can be configured to provide at least two different sized openings for accessing the reservoir, as well as providing a sealing and/or locking mechanism to close the port and seal the port. Exemplary closures comprising a base defining a fill port and mounted to a wall of the bladder, a first cap component that is attached to the base, and a second cap component (e.g., a lid) that is attachable and detachable (via threaded engagement, a pivoting snap fit, or otherwise) to the first cap component. The base can be fixed (e.g., welded) to the bladder to cover the bladder wall opening and provide a second, rigid opening, or port. The first cap component is coupled to the base and can overlie the port or be positioned around the port (optionally providing a third, smaller opening), and the second cap component can cover the first cap component to completely seal off the port and prevent fluid passage in or out of the bladder. The first cap component can include a lid release and locking mechanism.
