Uswe quick refill bottlethe uswe quick refill bottle made for quick n easy refills of the bladder to be able to refill your bladder you need uswes quick seal coupling to be attached to the drink tube when its connected just release the air valve at the bottle and the bladder will get quickly refilled features volume 075l bottle is bpa free and approved for food stuffs bottle includes screw cap and body quick seal coupling insert coupling not included need the insert quick seal coupling