Safe Material: BPA-free drinking water dispenser, quality silicone tube, food grade 304 stainless steel. Better insulation and high-density ABS plastic shell, non-toxic and odorless. High Compatibility: This water dispenser is suitable for 5.5cm neck guns. Fits 2, 3, 4 and 5 gallon buckets with 5.5cm neck. No need to open the lid, just place it on the bucket and it is ready to use. use. Fast Pumping, Low Noise: This water bottle dispenser is built-in a powerful 4W pump. This water dispenser pump has a faster pumping speed and is less noisy than conventional pumps. common water. This water pump is built-in 1200mAh high-capacity battery, USB charging interface, and can be recharged multiple times. Easy to use: This water dispenser has 2 pumping modes, press the power button once to pump water continuously, and press the button again to stop pumping. Press the 600ml button once: The device can pump 600ml quantitatively and automatically stop pumping. Note: Please charge the battery first