Acrylic Outer And Inner | Double Wall Construction For Insulation Of Hot Or Cold Liquids | Insert Decoration Is Inserted Between The Clear Double Walls Of The Tumbler Then Ultrasonically Sealed To Provide Double Wall Insulation | Snap-On, Spill-Resistant Thumb-Slide Lid With Rubber Gasket | Lids Packed Separately And Unassembled. | Meets FDA Requirements | BPA Free | Hand Wash Recommended