Our Transit Collection with AeroLight™ technology is engineered to be light, packable,and leakproof for the trail or the daily commute. Our commuter-friendly Transit Mugsare 33% lighter than Stanley’s standard stainless-steel metal drinkware. The collectionis built with Stanley’s AeroLight™ technology, which consists of spun-steel, doublewallvacuum insulation to reduce weight—without compromising hot/cold retention ordurability. These fully leakproof mugs offer a streamlined design and low-profile lid,compact and easy to carry. They also fit comfortably in car cup holders.