Carbonic acid remains inside, insects stay out: The crown caps are the practical companions when drinks are enjoyed from crown cap bottles. 4 pieces in a set (light green, dark green, red, pink) safe closure for crown cap bottles W 9.7 cm, D 3.2 cm, H 0.8 cm Silicone dishwasher safe The crown cork ensures that the carbonic acid remains in the bottle and insects stay out! Whether it's a barbecue or a picnic: because the closure is fastened to the bottle with a ring, it cannot be lost.