Double-wall stainless steel construction with vacuum insulation.Our insulated coffee mug is made with high-quality stainless steel , which is robust and durable, keeps the drink without any special smell. Plus, it's reusable, so you can enjoy your favorite drinks without creating waste.Featuring a capacity of 10 fl oz (300ml), with a leak-proof lid and a thin lip design for a comfortable drinking experience. Spill proof travel coffee mug with screw-in cup lid is equipped with a sealing ring, which provides a good leak-proof effect. These coffee mugs have been mindfully powder coated matte surface comfortable to touch.