Pet Drinking Fountain Materials: The top water storage bowl of the cat drinking fountain is made of food-grade 304 stainless steel. Thanks to the 120ml emergency storage volume, it can provide your pet with water even without electricity. And prevent the cat's black chin. BPA-free and dishwasher safe. Thanks to the transparent water tank design, you can keep an eye on the water level. Noise-Reducing Pet Water Dispenser: Our pet drinking fountains have a noise level of less than 20dB (passed professional laboratory tests). The water pump of this water dispenser is ultra-quiet and consumes little energy. The faucet's drainage pattern and unique backflow method reduce the noise of running water. Triple Filtration System: Activated carbon removes bad taste and odor; ion exchange resin could soften tap water; Non-woven fabric filters hair and impurities, and keeps the water cool through circulation. The automatic pet drinking fountain provides your little ones with pure drinking water and