The sleek D.Line Oasis Insulated Drink Bottles - A great way to indulge in cold beverages when you're on the go. It stays cold for up to 24 hours and hot for up to 12 hours. It features a stainless steel vacuum double wall construction, made from 18/8 stainless steel, for superior insulation as well as to reduced condensation. The tight fitting twist cap lid also has a silicone seal to ensure no leaks when you are on the go and ensures your bag stay dry. The Oasis bottle is made to last a lifetime and it is extremely easy to clean.