Our bathroom was not equipped with the optional small sink, so there was a corner with nothing in it begging to be organized.
A couple of plywood boxes now hold 6 drawers, three facing into the bathroom, three facing out towards the door. The problem of water getting into these items and their boxes seems to be not an issue after taking a shower in there to test it out. Some epoxy skimcoat and angled drawer front edges seems to work to keep the water out.
By scouring some catalogs I came up with Mepla drawer slides, full extension. They have little cylinders in them which grab the drawers 2-4 inches from the closed position and draw them gently but firmly to a silent close. So far they have not opened during driving, and I really don't expect them to.
The outside drawers are sized to hold 8 cans of canned food or equivalent each, and they make access quite easy. Made from "lenga" (also known as Chilean cherry), which is reasonably light
and cheap. I like the color, so gradually the other wood accents will be converted to this wood as they are replaced.