The Universal Water Bottle Is An Eight Ounce Water Bottle Made For Hamsters, Mice And Gerbils. Bottle Comes With A Free Hanger For Installation In A Wire Cage. Also, Includes An Adjustable O-Ring To Insert Into The Top Opening Of The Crittertrail Homes. M Search_Phrases: Pet Treats,Dog,Cat,Bird,Pet Products,Pet,Animal Treats,Super Pet,Super Pet Universal Water Bottle 8 Oz