Made of high quality glass material,durable,safe,healthy,environmentally friendly. Stainless steel bottle cap prevents rust and makes wine making more healthy. Airtightness: The airtightness is specially designed for brewing wine, It is not vacuum sealed, because the vacuum sealed faucet will not leak water, and it will not cause unsafeness due to excessive pressure during the wine brewing process. It affects the volatilization of alcohol and thus the effect of sparkling wine. Fine craftsmanship perfectly fitted with waterproof gaskets to ensure that the water does not leak. Large Capacity,can store water, iced tea and or lemonade,cold coffee,juice etc. Specification: Material:Glass 8L