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How to Make Your Own Ice Pack - I have done it and it works!
Make Your Own Ice Packs! Soak sponges in water (try the dollar stores!) and then freeze them in zip-top bags. That's all there is to it. As the water melts, the sponge reabsorbs it and holds it safely inside. Totally cool right?
How To Restore A Sponge With Salt. Get a little bit more life out of your sponge. Y’all know how sponges can become grungy but still have some “potential” life to them. To restore the sponge to “tip top shape” simply make a mixture of 1/4 cup of salt and 1 quart of water and leave the sponge in it over night.