Material - Our Coffee Insulated Mug Is Made Of 304 Stainless Steel, With A Frosted Surface Material Texture, Sweat-proof, And Has Excellent Grip. Strong And Durable, Not Easy To Rust And Damage. The Interior Is Polished, And The Surface Is Smooth And Easy To Clean. insulation - With Vacuum Insulation Technology And Insulated Stainless Steel, Which Can Keep Hot/cold Drinks For More Than 6 Hours So You Can Enjoy Coffee And Drinks Anytime And Anywhere. excellent Design And Wide Range Of Applications - With A Compact Design, Our Vacuum Insulated Tumbler With Lid Is Easy To Carry, And The One-button Buckle Design Makes Drinking Water More Convenient. Exquisite Craftsmanship, Suitable For Every Season, Elegant Appearance Can Be Perfectly Used For Home, School, Camping And Travel, Hiking, Picnic, Office Or Outdoor Activities. easy To Use - With Spacious Large Cup Design, More Convenient To Clean, Do Not Have To Worry About Stain Residue.