PREMIUM QUALITY: Lixit water bottles have been a standard for over 35 years. It features a thick high quality water bottle that is BPA free. | THE PERFECT SIZE: The 8oz bottle is designed for Hamsters and Mice. The bottle is weather resistant and can be used in outdoor environments. Not all small animals need the same amount of water. For the 8oz we use a 3/8-inch tube that is large enough to accommodate the water needs of the pets noted above. | VACUUM SEAL: Lixit bottles work by forming a vacuum to hold the water inside. It is important to fill the bottle all the way to the top and ensure the cap is on tight to prevent leaking. Some dripping when the bottle is first turned over is normal. | QUALITY STAINLESS STEEL: Our tubes are made of the same 304 grade stainless steel in food preparation. We polish our tubes until they have the same satin finish that is found in quality silverware. Each tube is hand coned on the end to ensure that it has a smooth tip that will not harm your pet. | Lixit water bottles are proudly made in the USA