The product to support your commute and on-the-go lifestyle. As a part of the Stanley Transit collection, the Aerolight™ Transit Mug is designed to be lightweight without compromising your desired liquid temperature. Keeping your drinks hot for 6 hours, or cold for 8 hours. The Bottle is also Leakproof, with a locking, drink-through lid. This means you do not have to worry about spills as you throw your bottle in your fishing bag. In addition, the AeroLight™ is dishwasher safe and BPA free, designed for easy cleaning. The Transit Mugs are 33% lighter than Stanley’s standard stainless-steel metal drinkware.