THE AEROLIGHT™ TRANSIT CUP Our Transit collection featuring AeroLight™ technology is designed to be lightweight, space-saving, and leak-proof – perfect for both hiking and your daily commute. Our commuter-friendly Transit cups are 33% lighter than standard stainless steel cups from Stanley. The collection utilizes Stanley's AeroLight™ technology, which consists of spun stainless steel and double-wall vacuum insulation to reduce weight – without compromising on heat or cold resistance or durability. These completely leak-proof cups offer a sleek design and a flat lid, are compact and easy to carry. They also fit comfortably in car cup holders.