Bathing Bomb Maker – Create your own fizzy spa moments

Intro

There’s something truly magical about dropping a bath bomb into warm water. It fizzes, it sparkles, it releases your favorite scents while nourishing oils gently shimmer on the surface. The water comes alive — and so does the experience.

With this 3D-printable Bathing Bomb Maker, you can easily create perfectly shaped bath bombs at home. Whether you’re crafting relaxing lavender spheres or vibrant, playful creations, this tool helps you compress your mixture evenly and achieve clean, consistent results every time.

Base recipe for 5-6 bathing bombs

• 250 g baking soda

• 125 g citric acid (powder)

• 60 g cornstarch

• 60 g coconut oil (organic quality recommended)

• Essential oils or fragrance oils (optional)

• Food coloring (optional)

• Dried herbs, teas, or flower petals (optional)

Notes on Ingredients

• Baking soda and citric acid are commonly used as mild household cleaners and are easily available in powder form.

• Coconut oil solidifies when cool and provides a nourishing skin feel.

• Alternatively, cocoa butter, shea butter, or cosmetic oils can be used — but they may result in softer bath bombs.

Important Disclaimer

Even though I’m a maker, I am not a cosmetic professional. Please choose ingredients that are individually suitable for you and your family, especially when using essential oils or colorants. Always check skin compatibility and consult a professional if you have sensitive skin or allergies.

After bathing, be aware that the bathtub may become slippery due to the coconut oil or other fats used. Rinse the tub thoroughly to avoid slipping.

How to Use the Bathing Bomb Maker

1. Mix all dry ingredients thoroughly.

2. Gently melt the coconut oil and combine with the dry mixture.

3. Add fragrance, color, or botanical elements as desired.

4. Lightly fill both halves of the mold. The filling aid (optional part, not shown in the model image) will help so the mixture does not get stuck in the the mold.

5. Press firmly together using the Bathing Bomb Maker.

6. Remove carefully and allow to dry for 24–48 hours.

That’s it — your handmade spa experience is ready.

Why you'll love it?

• Perfect results – Clean shape, strong compression, fewer cracks

• Reusable & durable – Print once and use it again and again

• Creative freedom – Customize scents, colors, and skin-friendly ingredients

• Fun & rewarding – A great DIY project

Recommended print settings

• Nozzle: 0.4

• Layers: 0.2

• Infill: 25%

• Top fill pattern: concentric

• Bottom fill pattern: concentric

• Seam: random

• Material: I recommend to use PLA (see below)

Filament recommendation

I printed this model using Prusa Prusament and got great results. See below for my recommendations.

Prusament PLA Pristine White

Copyright

You are welcome to print this model for personal use. Please respect the copyright. Unauthorized reuploads are monitored and reported.

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