... Bottle Caps 1.100% silicone material 2.keep bottle beer fresh 3.Eco-friendly and ... clubs and parties too. They're made of food grade silicone, non toxic, odorless, withstand low temperature, airtight, aging-resistant, reusable ... as well. the last but not the least ,the silicone beer cap is 100% silicone ,enviroment . Logos could be printed, embossed or debossed ...