I've been using SanDisk's Cruzer Micro 256MB drives.
Once, I was carrying one in my hand along with a highball glass full of Beaujolais. Needless to say, I fumbled the USB drive right into the glass, which was conveniently too narrow for me to fish it out by hand. I panicked for a moment, then grabbed another glass to pour out most of the wine, and sucked the drive out with the rest of the wine. Then I spit it into the sink, rinsed it off, dried it, and it's been working perfectly ever since.
It probably had a total of about 30 seconds of immersion between the wine and the water. I'm pretty impressed that it survived, so I bought a second one.
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Gemma Seymour (she/her) @gcvrsa