Serendipio Binary Stainless Steel & Plastic Double-Wall Tumbler - 450mlthe industrial style design of this tumbler makes it an attractive option for the right design or message. It features a stainless steel outer with a pp inner, so it will keep your drink hotter or colder for longer. 0. 45l 21. 5 ( h ) packaged in a grey serendipio gift box please note that drinkware items packaged in individual boxes that are branded in house are shipped with box lids open. This is a result of our production process to ensure