Double Wall Insulated: These Cola Shape Design Water Bottles Are Crafted With Coated Outer Wall And Solid Inner Wall,They'Re Cool To Touch When Filling With The Hot Liquids And Also Sweat-Proof With Cold Liquids,Highly Prevent Sweating, Condensation, Smudges And Fingerprints.Making Your Beverage Ready To Drink Just Fine | | Excellent Heat And Cold Preservation Tech: These Thermal Water Bottles Are Produced With Advanced Heat Preservation Technology And Also Leakproof And Shatterproof To Keep Your Favorite Drinks Cold Up To 24 Hours And Hot More Than 12 Hours | | Premium Stainless Material: These Insulated Water Bottles Are Made Of Upgraded 304 Stainless Steel, Durable And Unbreakable, Food Grade And Bpa Free And Also Rust Proof And With No Condensation,Which Is Of Great Benefit To Retain The Temperature And Taste Of Your Beverage | | Wide Applications: These Water Bottles Pack Are Light Weight For Easy Carrying With Your Backpacks And Hand Bags,You Can Use Them For Both Indoo.