Where has this been all my adult life???  This product was a game changer to our freezer.  We are very neat and organized in our freeze with separate shelves for beef, chicken, fish, pork, veggies/leftovers.  I thought I would try this system as we do have lots of bags of frozen veggies and they become such a mess with trying to see and find the one we need at the time.  This works perfectly!  I can either store bags in the slots, or boxes!  Genius!