Come and Check Our Promo Solutions.The tumbler is made of 18/8 food grade 304 stainless steel. It features double walls with vacuum insulated, reduces condensation and keeps your drink hot for up to 8 hours or cold for up to 24 hours. It can be used as wine cups, champagne cups, water cup or sports fan travel mugs, and are suitable for storing any drinkings. Pls check inventory and detailed info with us before placing your orders.