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. Non-Slip Bottom. Condensation Free. Removable Silicone Base. Swig LifeTM Is A Certified SWaM Owned Business. Meets FDA Requirements. Removable Silicone Base. BPA Free. Dishwasher Safe.