OASIS # 80408 Small Animal Bell Bottles, 8 oz. 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 8-ounce size