To a bowl or measuring cup add water and castile soap.
Mix in vegetable glycerin until dissolved.
Add in essential oil.
Pour into a soap dispenser and you are ready to go.
Notes
Place in a foaming hand soap container to make the body wash last longer.
If you don't have a foaming hand soap dispenser, you can use a regular soap dispenser, but I would recommend using a wash cloth or puffy mesh bath ball.
If you don't have vegetable glycerin you can substitute it for honey.
Have dry skin? This recipe is soothing and moisturizing, but you can also add in oil for extra moisture.
This should last 3-6 months. If there is any signs of spoilage, toss it.