This innovative bottle cap is fully automatic, reusable, and environmentally friendly. It fits standard crown cork and threaded bottles, is safe and healthy with insect protection, and can be used for large bottles as a pourer or advertising carrier. Its multiple color designs make it versatile for any occasion and easy to assign drinks. A must-have for garden parties, barbecues, clubs, festivals, and the beach. Enjoy carefree drinking with this easy-to-use bottle cap. 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