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 12 Hours And Hot Up To 3 Hours. Perfect For Golf Enthusiast. Non-Slip Bottom. Condensation Free. Swig LifeTM Is A Certified SWaM Owned Business. Meets FDA Requirements. BPA Free. Dishwasher Safe.