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