1. Made of high quality approved food grade 316 stainless steel. It will never leave a metal taste or rust, avoid the taste of the liquids to change. 2. Food grade, BPA-free, recyclable materials for our insulated water bottles and accessories. 2. Double walled and vacuum insulated, which keeps your favorite beverage cold & hot for hours. 3. Comes with a adjustable strap. Easy to carry for outdoor traveling or school. 4. Push-button lid with food-grade silicone straw. 5. Suitable volume with 260mL