1 bar (85g) castille soap, grated
3 - 4 cups water
Few drops of essential oil
Boil the water then add the soap, simmer and mix until completely blended, or the soap will clog the pump.
Leave the soap out overnight. If it is too thick, heat and add more water.
Add a few drops of essential oil (tea tree oil has great antibacterial properties), mix and pour into containers.