This year’s Valentine's day, we’re 3D printing molds to make DIY bath bombs.

This is a fun way to make custom bath bombs, soap or even chocolates just in time for that special Hallmark holiday.

We’ve remixed the design from our previous talking D20 project and simplified it a bit so it’s easy to mold parts. You can also modify the design if you’d like!


Try experimenting with different scents, colors and shapes to use as molds.

You can even use these 8 bit hearts from our choclate mold project!

Tools and Supplies

  • 3D Printer + Filament
  • 1/2 cup Baking Soda
  • 1/4 cup Citric Acid
  • 1/4 cup Cornstarch
  • 1/4 cup Epsom Salt (or sea salt)
  • 3 tsp Castor Oil (or any vegetable oil)
  • 1 tsp Essential Oil
  • Soap or Food Coloring 
  • 1tbs Water

This guide was first published on Feb 11, 2016. It was last updated on Feb 11, 2016.

This page (Overview) was last updated on Feb 09, 2016.

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