Recently I needed a gel ice pack to soothe sore muscles. When I found them at Wal-mart, I was offended by their high price. I thought to myself "there's got to be a cheap way to make one myself." And there is.
Step 1: Gather supplies:
1 disposable diaper (any body with little kids has one of these on hand for free)
1 gallon zip lock bag
Some rubbing (isopropyl) alcohol