This stainless steel tumbler will keep your iced drinks cold for up to 20 hours and hot drinks hot for up to six. The kit includes shatterproof crystal clear sip lid, straw lid and a straw. The double-wall vacuum insulation provides a sweat-proof hold. Expect a long life from this tumbler kit which is made of 18/8 Kitchen Grade Stainless Steel. Easy clean by hand washing with soap and water. Not for use in microwave or freezer.