Kordon Oasis value set consists a rigid plastic all weather bell bottle and basic Hold-Guard designed specifically to fit the bottle accurately and safely. Suitable for small animals like mice, rats, gerbils, hamsters and hedgehogs. A sturdy weather-resistant bottle along with a metal holder and guard that prevents your furry friend from chewing on the bottle. Adjustable strap hangs over top edges of most wire cages and aquariums. Available in 8-ounce size.