Recycled Stainless Steel Outer And Inner. Recycled PP Lid And Silicone Straw Material. Double Wall Construction For Insulation Of Hot Or Cold Liquids. Powder Coated Finish. Screw On, Spill-Resistant Sip Top Lid. Tone-On-Tone Look With Matching Lid And Base. Easy Carry Handle. Meets FDA Requirements . BPA Free . Hand Wash Recommended.