The beautifully designed matte double-layer vacuum flask coffee mug is food-grade, and the silicone ring on the lid makes it airtight. This coffee mug has a high quality double-walled stainless steel construction to keep your drink at its original temperature for up to 6 hours. The stainless steel 304 construct also ensures the long-lasting flavor of your drink with no peculiar smell. The Stainless Steel Double Wall Coffee Mug is made with 304food food-grade BPA-free Free Stainless Steel Material Pack your leakproof and spill-proof insulated mug in your bag, backpack, or suitcase without worrying about spillage or leakage. Take it anywhere you want go e.g., office, school, travel, parties, hiking etc. Enjoy the nice day and nice beverage! The thick rubber design at the bottom prevents the cup from sliding or turning. Suitable for home use or travel use.