The Swig 18 oz Mug's double-wall, vacuum sealed copper coated insulation will keep your drinks cold for up to 9 hours and hot up to 3. The non slip silicone base helps to prevent your drink from sliding or tipping. And it is dishwasher safe!
The BPA-free and spill resistant lid also have a rubber seal to seal your drink tightly. The opening which is straw friendly can be closed to minimize spilling.