High-quality Material- The body of this travel coffee mug is made of 304 Stainless Steel, sturdy and safe, rust resistant. These travel mug spill proof can serve you for a very long time. Dependability- Has double layer insulation that keeps temperature of your beverage for a good 6 hours for warm liquids and 12 hours for cold liquids. For iced one, can stay cold for over 24 hours. Reliable Leakproof Feature- Has a tight-fitting rubber ring seal to prevent leaks and spills even when turned up side down or placed in any of the 360 degree position. Non-Slip Rubber Bottom- This insulated coffee mugs with lids also has an anti-slip bottom making it stand firmly in a smooth surface keeping it in place. Portability with style- comes in different beautiful colors with handy sizes of 380 and 510ml. Use it for travels where you want to have a sip of your favorite drinks. Fits in the car drink holes. High- Quality material. This coffee travel mug can serve you for a very long time. With its 304 stainless steel body, it 's sturdiness is highly dependable. Re-use it many,many times with different kinds of beverages hot and cold. The double layer insulation keeps your hot drinks warm for as long as 12 hours and cold liquids for atleast 6 hours and if iced, lasts 12hours to over 24 hours. Reliable Leakproof feature. With the rubber ring seal around the lid preventing leaks and spills even when turned in any of the 360 degrees position. With its silicone cover enhancing the sealing capability. Anti-slip rubber bottom. This portable coffee mug can stand firmly on a flat surface keeping it in place preventing accidental slipping. Easy to maintain. With its wide opening and smooth inner lining, it is stain-free and easy to clean. Great Travel Companion. Comes in 2 handy sizes of 17.2 oz and 12.8 oz in different gorgeous colors that will suit your style. This stainless steel coffee cup can be used in travels, it fits in your car drink holes. Bring it where you will need a sip of your favorite drinks. This is also a perfect gift for someone who loves to bring their drinks with them. Enjoy it's use for a very long time.