What you need:
- Gallon size Ziploc freezer bags
- Fill two Ziploc freezer bags about one-quarter full of water.
- Seal the bag securely. Make sure they are completely sealed and free from leaks by turning in upside down.
- Place the bags inside of the shoes. Push the bag all the way to the tip of the shoe. The inside of the shoe should be filled with water. If there is not enough water, add more to the bag.
- Place the shoes inside an additional freezer bag to keep out moisture.
- Place in the freezer overnight.
- Take them out of the freezer and allow the ice to slightly melt so it can be removed from the shoe easily.
Benefits: easy, moderate to high success rate, free (assuming you have things on hand).
Drawbacks: Just like the heat method, plenty can go wrong with this ice stretching method. The biggest issue with this method is that you have no way of measuring exactly how much the water will expand. It can stretch the shoes so that they are distorted, or even stretch them enough to ruin them. Several people who have tried this method have had the bag rip and ended up with water spots on their shoes. Some material is damaged or discolored when frozen. Natural materials, such as leather, should not be frozen and thawed.
Bottom Line: If you have cheap shoes and are up for the risk—go for it.