SWEAT FREE DESIGN– No more coasters needed! - This customize coffee tumbler is better than plastic cups, plastic bottles, and glass, the double-wall insulation and high-quality slip-free powder coat does not sweat on the outside which allows you to conveniently keep a good grip on the customized coffee tumbler while drinking on the go and at the same time keeping your hands dry!BPA FREE & BUILT TO LAST – Customized coffee tumbler products are 100% BPA Free. Engineered with 18/8 kitchen and food grade stainless steel, our tumblers are durable, corrosion-resistant and rust-free and the lid is made from shatter-resistant plastic! The slim customize coffee tumbler design will fit all car, vehicle, bike, and boat cup holders.EXTREME TEMPERATURE RETENTION - This customized coffee tumbler's double-wall vacuum technology maximizes temperature retention by traps the cold in your beverages for 24 hours and the heat for up to 6 hours! No matter what the contents - hot tea, coffee, or an ice-cold beverage, the feel on this stainless vacuum tumbler remain constant!