Made Of Stainless Steel With Copper Plated Inner. Double Wall Construction For Insulation Of Hot Or Cold Liquids. Snap-On, Spill-Resistant Thumb-Slide Lid With Removable Slider For Easy Cleaning. Vacuum Insulated. Keeps Drinks Cold Up To 24 Hours And Hot Up To 3 Hours. Condensation Free. Swig Life™ Is A Certified SWaM Owned Business. Meets FDA Requirements. Dishwasher Safe. BPA Free.