【UNIVERSAL WATER JUG CAP】The 3 & 5 gallon water bottle caps are suitable for standard snap on (55mm) 2,3 ,5 and 6 gallon bottles, not for use with screw top bottle. 【COMPLETELY LEAK-FREE】Upgrade Non-Spill Plug system, no splash, no leak, even when the water bottle is on its side, sealing strong than general caps, clean and safe to create a sterile environment for crystal-clear water storage. 【ENVIRONMENT FRIENDLY】Water jug caps are made from 100% food grade silicone, BPA free. Healthy, environmental friendly, odorless, won't leach any harmful chemicals into the water. Easy to clean and dishwasher safe. 【SAFE AND RELIABLE】5 gallon water jug lid can prevent dust from entering,ensuring your drinking water remains pure and fresh during storage, perfectly for re-filling water cooler bottles for your home or office. You will always have the freshest water at your fingertips. 【EASY TO INSTALL】Just put the 5 gallon water jug lids on top of the kettle, press down hard with your palm, a sound “POP” is a key point to make sure spill free. Tear off the excess on the side to remove it easily.