【Premium Quality Stainless Steel】Coffee cup high-quality 304 stainless steel and the double,rust-proof leak-proof,The lid was made of food-grade silicone.-walled insulation design ensures beverage can stay either hot or cold over time. 【Leakproof Design】The coffee mug lid comes with an airtight silicone seal that prevents the drinks from spilling. Air Vent on the lid allows beverages to flow out smoothly, without gushing or overflowing. 【500ml Capacity】small and beautiful, Flip lid opens and locks easily,Narrow body design makes it easy to grab and go.Also fits most car cup holders and coffee makers. 【Easy To Carry】Enjoy your coffee easily wherever you go. Suitable for use indoor&outdoor, such as home, parties, travel, school, riding,and office time. 【Smooth Cup Body】There is a rubber cushion on the bottom of this coffee cup.Thickened the bottom of the non -slip cup, placed smoothly, avoid rollover, matte texture feel comfortable.