It is made of Stainless Steel. Offer your customers a great gift like this Thermos travel tumbler! It holds up to 17 oz. water or something. This has vacuum insulation for keeping drinks hot for up to 9 hours or cold for up to 20. Perfect for taking coffee or tea on the go. Add your logo and show everyone why they should shop with your business first! Pricing include shipping cost to ca. QTY over 5K pcs by sea. 100% guarantee for quality. Rush service is available. Thanks for your inquiry.