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. UL Listed (UL File #MH 60484, Model SP0413). 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.