I recently bought a waterproof fire safe for securing all of our valuables, i.e. passports, social security cards, pirate treasure, etc.
When I got it home and opened it, there was no apparent damage to the box. But low and behold when I opened the safe it had moisture and mildew in it and the instruction manual was soaking wet. Hmmmm.
Now excuse me while I go dig through the garbage for the receipt.