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 flavor. Your drinks are NOT in contact with plastic. That means you never have to worry about BPA, chemicals or endocrine disruptors. Each AYAandIDA product is laboratory certified to meet or exceed LFGB (food contact grade testing). Information: Capacity 500 ml Opening 3.6 cm Diameter 6.7 cm Height 23.5 cm Weight 290 g Our customers say: "I've used the bottles for hot and cold water while on the go with my little son. This gave me the freedom to make a bottle for him with the right temperature wherever we were. They are so good and at the same time so beautiful " Anita "Your drinking bottle is such an impressive product. It can lay out in 36 degrees hot weather, and get so hot that I can not even hold on to it ... while the water is still icy cold, as in