When I was a loader, 50lb paper boxes. Usually because they were all falling apart by the time the got to me! One company had it right, though. They would wrap the whole box in thick plastic. I can't remember which company it was. But, man did that help.
Straps and UPS don't work well together. Especially when they're holding together a 50 pound box of paper.
Tell me about it, I hate those paper boxes with a passion. They always come in pairs as well, 2 or more, and sometimes they come in bulk. Its like "come on, cant they go to staples or office depot to pick this stuff up?". Most likly, those companies have one of those places near by, leave it up to lazy Americans to order something far off in the distance instead of getting a hired worker to drive a few blocks down the road to gather a few paper boxes for work.
Pottery barn, as is said here, is also another one. Always large, long and forever heavey boxes that always never seem to be sealed and/or closed.
But I really hate eregs. Not that I hate just one or a few, its that out side with four loaders can get 30 on up to a 100 eregs everyday of the week. While theres people around my building that haven't seen an ereg in six months.
On the other hand, my favorite packages have to be RDL, RDR and RDC's. Why, well they are easy and quick to load no matter the size or weight. Its better then having a 1000, 4000 HINed package because it doesnt require one to walk half way or all the way into the car. Stacked out or placed in the back area of the car makes them a quick and easy thing to get rid off.