Keep your drinks perfectly cold for 24 hours and warm for 12! Made from 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 doesn't give off flavor. Your drinks are NOT in contact with plastic, so never worry about BPA, chemistry or endocrine disruptors. Each product is laboratory certified to meet or exceed food contact grade testing (LFGB). AYA&IDA's products are healthy for you and for our planet!