This cup is made of environmentally friendly food-grade material and double-layer insulation structure, which can keep water or drinks hot or cold for hours. No odor, no taste transfer, no sweating. Our cup is durable, unbreakable and rust-proof, so you don't have to worry about rust. With a large capacity of 40oz and equipped with a handle, it is very portable and fits most car cup holders. [Material Description] Inner layer 304 stainless steel, outer layer 201 stainless steel, lid PS [Applicable scenarios] Our cups are suitable for indoor and outdoor activities. You can drink while driving, staying at home, in the office, on the beach, at parties, camping, hiking, picnics and other occasions. [Washing Instructions] It is recommended to hand wash with clean water. Do not use detergents containing alcohol to avoid damaging the pattern. [Special Note] Due to different measurement methods, the error of this size data within 1cm is normal. [Exquisite Gift] Give your loved ones, family and friends an emotional gift on holidays, birthdays, Christmas, Mother's Day, Father's Day, Valentine's Day or any occasion.