I have a generic store-brand two-inch-wide by three-inch-tall box of Raisins.
On the box is the label 'REFRIGERATE AFTER OPENING'.
The odd thing is that the box is just an average raisin box. It's not airtight, it has no seal or wax coating, and is made of cardboard. The lid for the box is a flap that folds into the box itself.
I could be wrong, but this isn't airtight to begin with, is it?
Do raisins require refrigeration?