Oasis Hold-Guard Bottle is a standard bottle guard with hoook & loop tape for more secure installation. New dura color non toxic powder coating. Metal Oasis Basic Holdguards are uniquely designed to hold and protect water bottles against chewing and gnawing damage. The metal retainer ring flips down to secure the bottle in the holder. Sturdy plated steel construction prevents gnawing animals from damaging the bottle or cap. Use the adjustable strap hanger and bend to fit most cages, carriers, and glass cage habitats. Easy to remove the water bottle to clean or refill it. Assorted sizes available.