[Silound]

A closed box with even a crappy shrink wrap job can last a week out in the open indoors in my experience. After a week things start to get kind of dry and delicate.

If you worried, a couple 2 gallon Zip-Loc bags (or your local equivalent) will absolutely ensure they'll last for at least two weeks indoors. And even then you can take a folded up paper towel and put a few drops of water on it and stick that in the bag with the box.