Usually I am a fan of Sistema, but this is a thoroughly poorly designed product. I really wanted lunch boxes that could be properly cleaned in the dishwasher, so purchased 2 of these a few weeks ago. Within 2 uses, the hinges on both boxes had cracked so both are now pretty much useless. And secondly - the clasps you are supposed to undo to open the lids are extremely hard to open and hurt your fingers. Great idea but terribly executed...the search for the perfect school lunchbox continues!