These innovative fully automatic beer caps are made from food contact material and fit standard crown cork bottles and threaded bottles - glass and PET. They are reusable, environmentally friendly, and easy to clean. With color options and insect protection, they are perfect for parties, festivals, and beaches. They also serve as advertising carriers and can be printed with logos or slogans. Enjoy carefree drinking while protecting your open bottles from unwanted contamination or pollutants. Features 1. Innovative Cap Fully Automatic Beer Caps: Fully automatic bottle stopper, opens and closes your bottles independently, so you can enjoy carefree drinking. 2. Multiple Color Designs: For garden parties and barbecues, you can now mark your bottles with different colors make it easy to assign drinks to the appropriate person. Your favorite color on your bottle. 3. Environmental and Versatility: Made specially from food contact material, fits standard crown cork bottles and threaded bottles - glass and PET. Reusable over and over again, easy to wash off with water. 4. Safe and Healthy. Protect your open bottle in clubs, festivals and the beach from unwanted contamination or pollutants. Can also be used as a pourer or pourer for large bottles. 5. New Advertising Carrier: Through different advertising surfaces such as lid outside and side surfaces, this can be printed several times with logos, slogans or other. Easy to use in almost all areas - such as breweries, beverage distributors, sports clubs, industrial customers,ect. Specification Material: PP Color: Multicolor Size: 6 x 3 x 4 cm Weight: 130 g, 250 g Package Include: 5x Beer Caps or 10x Beer Caps