I store my sliced cukes in heavy duty platic bag removing as much air as possible. They will stay fresh with fairly firm centers for about a week in the fridge this way.
If you place them in water they will have mushy centers in just a day or two and if placed in vinegar they will taste like vinegar and basically will be pickled with a mushy center. Okay for cooking in stews or baked meals but not for fresh, crunchy salads ;-)
By
07/17/2009
Depending what you will be doing with them, I would think storing in a little water is better, otherwise they would dry out. I would not do this for long though as they would lose some taste. I myself always store any presliced cukes in white vineagar to cover for short term storage.