The containers show some general signs of wear from use, and have some scratches and debris, but appear to be in good useable condition.  I did soak the containers in hot and soapy water, but they have some hard to clean spots on them.  I did leak test the containers, and noticed that if you hold them upside down, you will see some slight dripping coming from the flip top area.  If you knock the container over, and just pick it up, it should be fine.  Please see photos for actual condition of items.  The unit's ship with USPS.  Thanks for looking!