1/4Pcs Office Anti-Drip Reusable Water Bottle Caps No Spill Top Lid Cover Water Jug Cap For 55mm Bottles Features No-Spill: Won't drip, spill or leak even if you store your jugs on their sides. Fits any jug with a standard 55mm opening Upgraded Design: Unique design makes the water jug cap can be put on or taken off easily, and the hanging ring design made it easy to hold. Easy to Install/Remove: Unlike plastic cap, The jug plug can be put on or taken off in a second, thus saving you hassle and aggravation. Simply press down on top to install it, then pry it off to remove it. It's so easy a child can even do it. Specification Material: TPR Color: Blue Package Include: 1 Water Bottle Cap or 4 Water Bottle Cap