The 20oz Tumbler is a non-toxic, lead-free, and BPA-free tumbler made from high-quality 18/8 304 stainless steel. It features double-walled vacuum technology, ensuring the temperature of your drink remains perfect for extended periods. The 20oz Bottle is made from the same material, offering rust resistance and portability. The 30oz Tumbler is a versatile and lightweight coffee tumbler, keeping wine chilled for over 9 hours or hot for over 6 hours. Its leak-proof slide lid is BPA-free, sealing in heat. The 30oz Sports Bottle is a water bottle made from the same material, preserving the temperature of water for hours. These tumblers are ideal for various outdoor activities and are suitable for various activities.