This bottle is made of double wall, vacuum insulated copper lined 18/8 stainless steel, so it will keep drinks hot for up to 12 hours and cold up to 24 hours. Fits up to 14 ounces of liquid. The Orb Bottle comes with a soft touch exterior and the lid can be used as a handy cup for serving a small portion when preferred. This product is 100% BPA free.