With its combination of sleek shape and BUILT's high-performance vacuum insulation technology, this stainless steel water bottle is perfect for maintaining your daily hydration. The vacuum insulated flask keeps your drinks hot for up to six hours, and chilled for up to 24. So, whether you're working up a sweat, working in the office, or working out how to beat the traffic, you can rely on it to keep your drinks nicely chilled or comfortingly warm for longer. It's made of 18/8 rust-resistant stainless steel, so it's BUILT to be refilled and reused, day after day. This conscientious design helps to reduce your consumption of harmful single-use plastics.