Anti-spill Design: The jug cap adopts an anti-spill design with strong sealing, which ensures that the water in the jugs will not splash, leak or spill, while preventing dust from entering, keeping the water clean and sterile. Reusable: You can recycle and reuse the water jug cap thousands of times, which can save you a lot of money. Say goodbye to one-time-use water caps, save the environment and reduce plastic waste. Widely Used: Fits any jug with a standard 55mm opening, including 5-gallon and 3-gallon jugs, and even fits screw top bottle. Easy to install and remove, just press the top to install and pry open to remove. Safety and Environmental Friendly: Our water jug caps are made of food grade silicone, which is healthy and environmentally friendly, odorless, soft and elastic, ensuring that drinking water can stay pure and fresh for a long time, and is very suitable for use in water jugs at home or in the office.