Swig 18 ounce matte mug lets you enjoy more of your favorite beverage. A silicone base minimizes slips and gives you a quiet landing when you set down your mug. The SEAL-TITE Tritan lid is BPA-Free, spill resistant and shatter proof. Seals tightly with a rubber seal gasket while allowing you to see inside. Double wall, vacuum sealed copper coated insulation keeps drinks cold up to 9 hours and hot up to 3 hours. A powder coat finish keeps your Swig looking fresh all the time. Matte outer finish.