I loved the idea so I made it!
Here's what you need:
Cheese grater
2 Tablespoons of Liquid Glycerin (found in the band aid section at any drugstore or grocery store)
1 - 8 oz bar of soap
1 gallon of water
Step 1:
Grate the entire bar of soap
Step 2:
Fill a pot with 1 gallon of water and add the soap shavings
Step 3:
Add 2 Tablespoons of liquid glycerin and turn the heat to medium/high for about 20 minutes and stir until the soap dissolves.
Step 4:
This is what it looks like once it's dissolved, basically just soapy water.
Step 5:
Leave it alone to cool for at least 10-12 hours. It begins to cloud up after 3-4 hours
Then you have a gallon of soap that would normally cost $25 - 30 dollars!