Slightly off-topic, but I went to Vancouver last year and was asked instructed by a certain FTer (*cough* missy *cough*) to buy all the Spicy Indian Masala Lays Potato Chips I could get my hands on. I went to about six Safeways and ended up with two cases (20 bags) worth of various flavors. I used the original packing boxes that one of the Safeways gave me and I checked them in as my luggage, marked fragile. They survived well, with the exception of one or two bags that opened (perhaps due to the change in pressure). I think the goal is to pack them snugly to prevent as much shifting as possible and prevent the chips from breaking.