I do not use the watertight containers. For one, the ones
I've messed with have been a pain in the butt to open, but
that helps with the seals to keep out water.
Not found the need for watertight boxes at this stage of the
game. Now that I'm doing saltwater fishing, too, I have
thought about it, but not made any moves to upgrade.
Bottom line, I've not had enough stuff rust out to make it
a big deal to me. I have, for some boxes, kept a silica gel
pack in 'em. That works great, too. The ones you get in shoe
boxes...