Bharat's team specially engineered our Tiffin's for commuters and therefore designed them to be ultra-light weight. Our Tiffin's weigh in at low gms, the lightest in the industry. We shaved off milligrams from the outer & inner walls, from the containers. We used the densest insulation material so that we need to use less of it, and saved precious milligrams. The result is a truly light Tiffin designed for our commuter customers.