The real 3 x 3 x 3 bubble cube: all 27 bubbles, about 61 mm on each side, with a flat base so it stands. Every pair of bubbles meets in a narrow waist, and that is why no rigid mold can release this shape. It is a silicone job, and this is a silicone mold kit.
Made with the hugging-shell mode of our silicone mold maker, which is the mode the site's own mold advisor recommends for this shape. You print a base with the bubble cube already fused onto it plus a two-part shell that follows the cube's outline, pour about 268 ml of silicone into it, and the cured silicone is a flexible mold you can cast candle after candle in. A plain box around the same cube would take about 40% more silicone.
The bubbles are exact spheres with a hidden core, so there are no tunnels between them for silicone to fill: the candle comes out solid. The zip carries every printed part, the bubble cube master as its own STL, the tool's own print-settings sheet and a recipe file for the generator.
Shown as a 3D render of the printed parts and the candle, not a photo.
What you need
- About 296 ml of silicone (mix it in one batch)
- About 163 g of wax per candle: each cast is 181 ml
- Steel binder clips, tape or a hot glue gun
- A primed wick for a 60 mm candle
How to cast it
- Print the base, which has the master already fused onto it, and the two shell halves. No supports.
- Stand the shell halves on the base around the master and hold the seams shut with steel binder clips. The seats for them are built into the shell.
- Tape the outside seams or run a bead of hot glue along them, because silicone finds every gap.
- Mix 296 ml of silicone in one batch, pour it into the open top in a thin stream, and fill level with the rim.
- Once it has cured, unclip the shell, lift it off and peel the silicone off the master. That silicone is your mold.
- Set the silicone back in the shell to keep its shape, and cast into it through the opening the base left.
| Cast material | Candle wax |
|---|---|
| Total print time | 15 h 45 min |
| Printed parts | 3 |
| Size (W x D x H) | 105 x 105 x 72 mm |
| Filament | ~198 g |
| Layer height | 0.2 mm |
| Infill | 15% |
| Supports | Not needed |
| Printer | Sliced with PrusaSlicer 2.7.2: 0.4 mm nozzle, 0.2 mm layers, 3 walls, 15% infill, MK3-class speeds. These parts only hold liquid silicone while it cures, so PLA is fine. No supports. |
| Download | ZIP: 3 printed parts (STL) + candle master (STL) + print sheet + recipe |
| Added | 2026-09-24 |
Pro early access until October 24, 2026, then free with any account.
Free for personal use. Selling the pieces you cast needs a commercial licence (Pro or Founder); passing on the file itself is not permitted on any plan. Full terms.
Made with the free silicone mold maker generator. Upload your own model and get the same kind of mold built around it, in your browser.
New to casting? Read the silicone mold maker guide.
