Double Wall Stainless Steel Coffee Cup --- Made of high-quality stainless steel, durable and keeps drinks odor free Non-slip Grip Bottom Design --- Matte, silicone cup body not only make the thermos mug looks elegant, but also offers a comfortable way to hold. And the rubber bottom helps to prevent the coffee mug from sliding and tipping over. Besides, the bottom diameter of the cup is 70mm, special designed for car usage Leakproof and Splash-proof Lid --- BPA free screw lid, along with the silicone seal ring avoid water leakage. It has a splash-proof flip-lid for convenient drinking, just need open the sip hole. Inner square and outer circle design for outer of the lid make it easy to open. Twist to open for fast filling and easy cleaning Keep Drinks Cold or Hot for Hours --- Double wall, vacuum sealed design makes the reusable coffee cup keep drinks cold or hot up to 6 hours Functional Style --- Pack your leakproof and spill-proof insulated mug in your bag, backpack or suitcase without any worrying about spillage or leak. Take it anywhere you want go, to office, school, travel, parties, and etc. Enjoy the nice day and nice beverage