Made Of Stainless Steel With Copper Plated Inner | Double Wall Construction For Insulation Of Hot Or Cold Liquids | Snap-On, Spill-Resistant EZ Slider Lid With Removable Slider For Easy Cleaning | Vacuum Insulated | Keeps Drinks Cold Up To 12+ Hours And Hot Up To 3+ Hours | Party Cups Can Be Stacked Together | Non-Slip Bottom | Silicone Base | Condensation Free | Swig Life™ Is A Certified SWaM Owned Business | Women Owned | Meets FDA Requirements | BPA Free | Dishwasher Safe