These are very sturdy and stackable, perfect for our business. However, the one time use is a double edge sword. It's nice our customers know they are getting a sealed product, but if we need to reopen a product for whatever reason, or don't sell out and need to repackage, we cannot reuse a closed container without breaking the "seal". Also, opening these is extremely difficult! The lock/seal part makes it really difficult and they could benefit from having larger pull tabs. Overall, great product for the price. Just kind of wish the lock/seal part didn't exist but it isn't the worst problem.