Features 1. No-Spill: Won't drip, spill, or leak even when jugs are stored on their sides. Fits any jug with a standard 55mm opening, including 5-gallon jugs. Compatible with threaded screw-top jugs as well. 2. Upgraded Design: Unique design allows the water jug cap to be easily put on or taken off. Hanging ring design provides convenient handling. 3. Food Grade Silicone: Made from food-grade silicone that creates an air-tight seal and does not leach harmful chemicals, helping keep drinking water pure and fresh during storage. 4. Multiple Uses: Suitable for use with water dispensers, water coolers, and water jugs on the top rack or with water pumps in home or office settings. The center button remains attached to the cap after installation, preventing it from floating in the water. 5. Easy to Install and Remove: Unlike plastic caps, this jug plug can be installed or removed in seconds, saving time and effort. Simply press down to install and pry off to remove. Simple enough for a child to operate. Specification Material: Silica gel Color: Blue Size: 5.5 x 5.5 x 2 cm Weight: 45 g (single), 95 g (package) Package Includes: 2 Water Bottle Caps or 4 Water Bottle Caps