Whether you’re on the job or on the run the NorChill High-Performance Tumblers are engineered to overwhelm. Our thermodynamic insulation system will ensure your favorite beverage stays hot or cold for hours. Our double lipped lid seal creates a waterproof bond so you can worry about navigating that morning traffic without a lapful of hot coffee. The splash resistant vent slider on our lids keeps liquid inside the tumbler when the going gets rough. The tumblers are easy to clean, dishwasher safe and BPA free for years of enjoyment.