Robust steel, but as light as a feather. The simple and elegantly designed Stanley AeroLight thermo mug is perfect for commuting or on your desk. The AeroLight is suitable for hot and cold drinks and is remarkably light compared to similar sized thermo mugs. The secret lies in Stanley's AeroLight technology, which doesn't skimp on durability or thermal performance. Coffee or tea stays hot, and cold drinks stay refreshing for hours. The lid closes tightly, so you can safely throw the mug in your bag or rucksack without the risk of leakage. The cup is also compatible with most car cup holders.