Stainless Steel Outer And Inner. Powder Coated Finish. Double Wall Construction For Insulation Of Hot Or Cold Liquids. Screw-On, Spill-Resistant Lid. Wide Mouth Opening. Easy Carry Handle. Meets FDA Requirements. BPA Free. Hand Wash Recommended. Spot Clean Base. Charge Qi Enabled Devices Wirelessly By Placing Compatible Device On Top Of Charging Pad. Features A Micro USB Input (Cord Included). Output: 5 Volts/2.1 Amps. 3600 mAh Lithium Ion Grade A Non-Recycled Battery. Indicator Light. Please Note That Some Computer And Laptop USB Ports May Not Supply Enough Power To Charge A Device Using This Charging Pad.