OASIS  #80404  Bell Bottle for Small Animal, 4-Ounce (Assorted Colors) Bell Water Bottle For Small Animals Has Double Ball Vacuum Valve Made Of Rigid Styrene Plastic Material, Breakage-Resistant And Hold Water Well Features color coordinating caps, stainless steel drinking tub containing two stainless steel balls and mounting bracket Suitable For Up To 3 Rats, Hamsters, Gerbils, Hedgehogs, Sugar Gliders And Similar Pocket Pet Type Animals Available In 4-Ounce Size