"I opened and checked my 72 hour kit (it has been more than two years) and my poptop cans of fruit had exploded and covered all my other items with sticky goo. It seems that the top seals are not as strong as a normal can because my tuna and spagettios were FINE!"
Update: Michelle shared another warning in the comments of this post:
"I found that Jolly Rancher candy melts and gets all over everything. We had our 72 hour kits in the garage in a #10 can and I went to check on how well they were holding up, well my J/R melted all over everything and it was just a big sticky mess."
Another warning was given in comment #11 about not using mint flavored gum!
So you might want to replace any pop top cans with regular cans and take out any Jolly Ranchers. If you put regular cans in your 72 hour kit make sure to pack a can opener! Find more resources in the Food Storage and Emergency Preparedness category.