Meanwhile, I have a number of Lock & Lock boxes in use and I can only say that the workmanship and quality are simply top. I take the cans to the office to transported daily to various foods. So far nothing has been leaked. Doses close really airtight and watertight! The L & L cans come in my office and every day in the microwave and dishwasher. To date, neither the box nor the cover have disappeared. The cans do not accept any color or odor. They look like the first day. I can recommend this practical doses for each fully. It is this set with the smaller round cans is perfect for the transport of liquid things like sauces and salad dressings.