Add the coconut oil, natural soap, and shea butter to a microwave safe bowl. Microwave at 50% power for 30 seconds. Stir and continue to microwave at 50% power in 10 second increments until completely melted.
Remove from microwave and stir the soap mixture a few times. Allow to cool for 1 minute.
Add the green soap colorant and stir until your preferred shade of green is achieved.
Add the granulated sugar and mix well to incorporate.
Add the lime essential oil and stir to distribute.
Transfer to your favorite cubed silicone mold or ice tray, filling up to the top. Chill in the fridge for 2 hours to allow to harden.
Gently pop out the key lime DIY sugar scrub bars from their molds and store in an airtight container for up to 6 months.
