Made Of Stainless Steel With Copper Plated Inner. Patented Texture Finish. Double Wall Construction For Insulation Of Hot Or Cold Liquids. Snap-On, Spill-Resistant Thumb-Slide Lid With Removable Slider For Easy Cleaning With Flexi-Straw. Vacuum Insulated. Keeps Drinks Cold Up To 24+ Hours And Hot Up To 9+ Hours. Perfect For Golf Enthusiasts. Non-Slip Bottom. Removable Silicone Base. Condensation Free. Swig Life Is A Certified SWaM Owned Business. Women Owned. Meets FDA Requirements. BPA Free. Dishwasher Safe.