Keep your drinks perfectly cold for 24 hours and warm for 12! Made of 1st class food approved stainless steel 18/8. Perfect on the go whether you have tea, coffee, lemonade or ice cold water in your bottle as it does not give off flavour. Your drinks are NOT in contact with plastic, so you should never worry about BPA, chemicals or endocrine disruptors. Each product is laboratory certified to meet or exceed LFGB (food contact grade testing). AYAIDA's products are healthy for you and our planet!