Come and see our amazing products. This tumbler is made from high quality 18/8 304 food grade stainless steel. Lead free and rust-proof. With double-Wall vacuum technology to keep drinks hot for over 3 hours and cold for around 9 hours. It features a straw hole to prevent splashing. Easy to clean, dishwasher free. Pls confirm further with us if any query about packing info, inventory status and time schedule.