Durable steel, yet as light as a feather! The simply and elegantly designed Stanley AeroLight thermos mug is perfect for commuting or on your office desk. The AeroLight is suitable for hot and cold drinks, and it is remarkably light compared to similarly sized thermos mugs. The secret lies in Stanley's AeroLight technology, which does not compromise on durability or thermal performance. Coffee or tea stays hot, and cold drinks remain refreshing for hours. The lid seals tightly, so you can safely toss the mug into your bag or backpack without the risk of leaking. The cup is also compatible with most car cup holders. This model has a capacity of 470 milliliters, so it can even serve coffee for a friend if needed.