MADE IN THE USA! (Most of the caps you will find on Ebay and Amazon are from China!)These premium non-spill water bottle caps come with a foam insert to protect against leakage, and are a tighter fit than the other caps sold on Ebay. If you purchase caps that do not create a tight seal, you risk your water leaking out of the coooler onto the floor. Don’t risk water damage, and purchase our caps, which come with a 100% Guarantee!Fit: 3 and 5 Gallon Water Bottles with standard snap-top (Not Screw Type). After filling your bottle with water, simply push a cap on the top, and your bottle will be vacuum sealed against leakage while in storage, as well when placing on your water cooler. These caps are designed for water coolers with the «prong» that punctures the cap and releases the water into your cooler. The sealed tops also provide a sterile environment for the water, and these caps are designed for one-time use only.