Features 1. 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 5 gallon jugs. You may even use it for threaded screw top jugs if you'd like. 2. 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. 3. Food Grade Silicone: Food grade silicone will provide an air-tight seal and won't leach any harmful chemicals into your water, ensuring your drinking water will stay pure and fresh for as long as you store it. 4. Multiple Occasion: Suitable for water dispenser, water cooler, the center button stays attached to the cap once it's placed, instead of floating around in the water; also for water jug on top rack or with water pump in both family and office. 5. 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: Silica gel Color: Blue Size: 5.5x5.5x2cm Weight: 45 g, 95 g Package Include: 2 Water Bottle Cap or 4 Water Bottle Cap