I worked at USPS until this past October. It went all the way through to its destination. It seems the zip code was okay but the address was no longer applicable. It should have designated that it was a bad zip if that were the case.
FYI- I sent a package with 50 snack size bags of potato chips(20 plain and wavy), doritos, etc. to Sebia earlier this month (on July 6th) and specifically asked if the chips made it. I made sure each bag was pressed down among the others and that they couldn't wiggle around each other in the box. I was told they made it just fine.
Chip manufacturers place many of their chips on trucks across the country and think of all the bumps they endure along the roads! I think many just ask for Pringles because the container makes them easy to store.