Recycled Stainless Steel Inner And Outer. Stainless Steel Tumbler With Handle. Bamboo Lid And Handle. Powder Coated. Double Wall Construction For Insulation Of Hot Or Cold Liquids. Keeps Drinks Cold Up To 24 Hours And Hot Up To 8 Hours. Screw On, Spill-Resistant Lid with Straw Hole and 12" Recycled PP Straw. Vacuum Insulated. Meets FDA Requirements. BPA Free. Hand Wash Recommended.