LOCK & LOCK travel mug is portable and easy to use for multiple purposes. It's designed to contain hot or cool beverages for long time with double-vacuum technologies. Harmless stainless 304 will keep you safe. Take a privilege of using various designs of premium tumblers. From daily activities to outdoor sports including hiking, camping and Mountain climbing, you could enjoy the convenience of LOCK & LOCK travel mugs in style. Take pleasure in hot or cool beverages all year round.