I've had one for two years and nothing works as well.
Mine was made from 2 cups of DAWN and 1 cup of rubbing alcohol.
I used the good ziplock bags- one inside on another with one zipper side down inside the other with the zip on top.
Loosely wrap in a thin dishtowel or into a old pillow case. Mine started leaking after about a year so I just poured it into new bags.
It freezes nearly solid but becomes maleable quickly. Don't use on bare skin without a cover- they are really, really cold.
10 BEST 'CHEAP' WINES per Men's Health - Studies show that drinking a glass or two of wine every day (particularly red) can lower your risk of heart disease, stroke, diabetes, Alzheimer’s, and even cancer. I for one take this research very seriously! (like I needed an excuse to start drinking wine again!) ;-)