Okay I was watching Survivor Man in the episode where he is a drift in a
life raft and the issue of palatable water came up, and what to do if it isn't quite palatable and might make you sick, but the water itself could save you.
Apparently if you have water that is marginal at best and could make you ill, thus creating further dehydration, the best thing to do with the water is to give it to yourself via an enema. By using an enema, the water does not challenge your stomach and is absorbed by your intestines.
Now I throw this out there as kind of the last ditch survival thing to do, but who knows who this piece of trivia might save. People have been using the enema method for some years now and it works - at least according to Survivor Man's research.