+Do you mind repeating it? What are Multi-D boxes?+
Multi D boxes are shipped to you as one flat piece with a few recommended fold lines. If you follow their instructions (sort of like easy Origami), you can turn that flat piece into an amazing custom-fit, heavy duty cardboard container for your items. Great for new or collectible books where condition is important. It holds them securely in place and doesn’t tear easily (if at all).
I found their prices a lot cheaper than ULine if you order a decent quantity. Don’t expect big discounts if you’re only ordering a hundred at a time. The shipping wasn’t as bad as I’d thought, either.
I decided to use them because I also order a LOT of books, and can’t stand getting a new book in a flimsy crappy little plastic sleeve, especially media mail. To me, it shows a seller doesn’t care if my book arrives in decent condition.
We’ve actually gotten feedback about the “great protection” we provided for our books, and can keep our prices down at the Media rate instead of going up to Priority for the so-called “Free boxes.”
Good luck to you…