Come and see our amazing products. It is made of food-grade stainless steel. Stainless Steel Coffee Tumbler is firm, Rustproof, No harm to human health, and without metallic taste. Tumbler's double-layer insulation. Keep your tumbler dry and neat.Insulated tumbler has a vacuum double wall design which ensures good insulation. No matter which season you are in, you can enjoy your favorite hot and cold drinks for a long time. Fill your mug tumbler with coffee, boba tea, ice water, milkshakes, lemonade and more, keeping hot drinks hot for up to 12 hours and cold beverages hard for 24 hours in winter and sunmmer. Pls confirm with us about the packing info, stock color and exact production time before placing your order.