Originally Posted by DogHouseMom
Semnantics - they are made from corrugated, not "cardboard". Cardboard is flat (like a cereal or Kleenix box), corrugated has a fluted center.
Good idea but a few words of caution. I worked in the corrugated industry for over 20 years...
Hmmm thanks for the info. I've been using them for about 10 years without a problem, probably lucky. I will say that I don't use them for long term storage (like stash), just a few weeks as I work on a project.