I don't think my prescription is odd, but the chances of finding someone on Bonaire that could use my glasses are remote. But, since most thefts out of trucks at dive sites are by kids, they will probably take anything, and sort through it later. The inconvenience of having my glasses stolen (I do pack an extra pair) is enough that I decided to use one of these.
Note that it is not waterproof (at least not to any depth that a diver would be at). I don't care. I found it inexpensive, and it is pretty much crush proof for circumstances that a dive would be subject to. I know the o-ring on mine is damaged, and a new one might make it more water tight, but I really don't care if my glasses get wet, as long as they are not bent/broken.
I put a $20 bill in this case, so it is not floating loose in my pocket (think dry suit pockets on my wet suit). Like I said before, I don't carry my driver's license with me, and it doesn't hurt if the bill gets wet. I've presented wet bills to merchants and none has even looked surprised.
