This 900 ml tumbler is crafted from double walled vacuum insulated recycled stainless steel with a leakproof sip straw lid and wide grip carry handle, combining sustainability with everyday functionality. The inbuilt sipper straw means you'll never need to remember to carry a straw again. Sustainably made from RCS-certified 68% recycled stainless steel (SS304 grade inside and outside). Perfect for keeping beverages hot for 5 hours, and cold up to 15 hours. Packed in a recycled kraft box.