Made Of Stainless Steel With Copper Plated Inner. Double Wall Construction For Insulation Of Hot Or Cold Liquids. Screw-On, Spill-Resistant Sip Through Lid. Vacuum Insulated. Keeps Drinks Cold Up To 24 Hours And Hot Up To 3 Hours. Non-Slip Bottom. Perfect For Golf Enthusiasts. Condensation Free. Patented Texture Finish. Swig LifeTM Is A Certified SWaM Owned Business. Meets FDA Requirements. BPA Free. Dishwasher Safe.