【Keeps cold and hot for hours】 510ml coffee mug has the maximum temperature resistance to keep drinks hot for 4 hours / cold for 6 hours. Pour hot or iced coffee into your coffee travel mug and feel energized all day long! 【304 stainless steel liner】304 stainless steel, brewing without odor, acid and alkali resistance, long use without deterioration. 【360° leak-proof】Silicone seal with a key locking design, fearless inverted shaking and tumbling, dripping water does not leak. 【Open and close freely】A finger flick can easily drink, a gentle press can be steadily closed. 9CM wide large diameter, hand easy to stretch into the cleaning. 【Height for car environment】The top is wide and the bottom is narrow, easy to place, non-slip silicone to hold and place steadily. Small mouth to drink is not easy to spill, one-handed open more easy to drink.