Oasis Hold-Guards are designed to hold and protect OASIS water bottles. Sturdy powder coated steel wrap-around guard prevents gnawing animals from damaging the bottle or cap. Adjustable strap hanger bends to fit inside most wire cages carriers and aquarium tank-type environments. The flat hanger slips through wire cage mesh or when used in aquariums the strap hangs over the upper edge anywhere around the tank. Securely attach directly to wooden cage walls with appropriate wood screw. Holds and protects a 4 ounce bottle.