Fill foaming hand soap dispenser 1/3 of the way full with castile soap.
Add favorite essential oil to scent (Orange, lemon, eucalyptus, or tea tree are my favorites). Swirl to mix well.
Add distilled water slowly to fill the rest of the bottle. Make sure to leave enough room for the pump to displace some liquid.
To make liquid soap omit the water and fill the bottle with the castile soap.