"Guaranteed Not to Leak"

Why is it so difficult to make something fit back into its original box??

My inflatable camping couch sprung a leak. I tried to repair it on my own with tape and glue, but that only lasted a few weeks. So I packed it up. Originally I was going to send it in to the repair shop since it's still under its warranty period, but then it occurred to me that buying a "repair kit" would probably be cheaper than paying shipping/insurance to send this box to and from the repair shop.

So...now my couch is in a box.