Tumbler with a durable outer wall made from RCS certified recycled stainless steel and inner wall made of plastic. Keeps drinks cold for 12 hours or hot for 12 hours. It includes an integrated food grade silicone straw and a splash-proof press-on lid for a smooth drinking experience. This tumbler is also suitable for hot beverages, but it is not advised to drink them using the straw. To let your drink cool down, remove the lid before consuming. Volume capacity: 900 ml. Hand wash only.