Thermos 18-ounce stainless steel hydration bottle is made with Thermax double wall vacuum insulation for maximum temperature retention and is BPA free. Designed to keep drinks refreshingly cold for up to 12 hours. Made with unbreakable stainless steel interior and exterior, with a sweat-proof design: it wont leave water rings. Push- button sipper lid has locking ring to prevent spills: ideal for water, iced tea, juices or sports drinks. Capacity:18-ounce/500ml