Features a stainless steel tube that is large enough to accommodate the water needs of dwarf rabbits, ferrets, guinea pigs and other small animals.  This weather-resistant bottle is BPA-free and can be used in outdoor environments. Features a vacuum seal to prevent leaks. Made in USA

8 Ounce: Features a 3/8 inch stainless steel tube. Best for hamsters, rats, mice, dwarf hamsters, small birds, and other small animals.
16 Ounce: Features a 3/8 inch stainless steel tube. Best for guinea pigs, rats, ferrets, and small rabbits.
32 Ounce: Features a 7/16 inch stainless steel tube. Best for rabbits, ferrets, and other similarly-sized small animals.