The Lixit Small Animal Water Bottle is designed to hang like a bell inside aquariums or cages, this water bottle gives them access to water whenever the thirst strikes. Its compact design is made to fit the mouths of mice, rats, hamsters, gerbils, guinea pigs, hedgehogs and other small animals. Plus, the rounded edges make it gnaw- and climb-resistant. Made of weather-resistant steel and plastic, it's suited for both indoor and outdoor cages, and it's capped with a non-toxic rubber seal.