Stanley Aerolight™ Transit Mug is Designed to be Lightweight Without Compromising Your Desired Liquid Temperature. Keeping Your Drink Hot for 4 Hours, or Cold for 6 Hours. the Bottle is Also Leakproof, with a Locking, Drink-through Lid. the Aerolight is Dishwasher Safe & Bpa Free, Designed for Easy Cleaning. Our Commuter-friendly Transit Mug Set Are 33% Lighter Than Stanley’s Standard Stainless-steel Metal Drinkware. Available in Black, Royal Blue, Shale, Fog, Rose Quartz, Cream. Minimum Quantity: 25.