Melt the Shea butterĀ and beeswax together in a double boiler or an aluminum bowl inside a pan filled with warm water on low to medium heat.
Add the essential oil if desired, this is optional.
Pour immediately into lip balm containers while it is still liquid wax and then wait until everything cools down and harden to use the chapstick (at least 1 hour).
This recipe makes 4 to 5 * 0.15 oz lip balm container and can last up to 1 year (but also depending on the shelf life of the butter you use).