Years ago we had a kid who left the night before a meet a pound over and coach told him to eat and drink real "light" and he could run whatever he didn't sleep off in the morning. He came in 4 1/2 pounds over the next morning. When asked what he ate and drank. He told coach he only had a one bag of marshmellows and some skim milk. He said he ate the "lightest" things he could find.
I drank several light beers one night and I didn't lose anything either.
SlamBam