◆ Aroma beads

Vintage truck car freshie mold

A vintage pickup truck car freshie with round fenders and a tailgate. Two per bake, silicone you pour yourself.

Make your own tray mold
3D render of the printed caster for a two-cavity vintage truck freshie mold, with three red pickup truck car freshies with round fenders in front
Aroma beads ~90 g Pro early access

A vintage pickup truck car freshie 109 x 65 mm and 10 mm thick, nose to the right: a rounded cab with a window, a long hood with grille bars and a headlight, round fenders over two spoked wheels, and a bed with a rail and a tailgate. The wheels, window and fenders are all outlined, so a second colour stays where you put it.

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Made with our tray mold generator in its flexible silicone tray mode: print the caster, pour a platinum silicone into it and peel out a mold for two trucks. Bake the aroma beads in that silicone, never in the print. The hanging hole sits at the top of the cab.

The old red farm truck is the freshie that changes with the seasons: pile hearts, pumpkins or a Christmas tree in the bed with paint or mica and it is a new product. The zip carries the printed caster exactly as the tool exported it, one freshie on its own as an STL, the master uploaded to the tool, and a print and pour sheet with the silicone figure the tool measured.

Shown as a 3D render of the printed caster with three trucks in front, not a photo.

What you need

4
  • About 167 ml of platinum silicone rated for 200 C (400 F) or more
  • Unscented aroma beads, about 37 ml per freshie by volume, heaped
  • Freshie fragrance oil, red and black bead colour, silver mica
  • A baking sheet, a skewer, and elastic cord to hang it

How to cast it

6

  1. Print the caster as exported, open side up, no supports. It never goes in the oven: it is only the form the silicone cures in, and PLA softens at about 60 C.

  2. Pour 167 ml of a platinum silicone rated for 200 C (400 F) or more into one corner in a thin stream, letting it rise over the shapes to the rim. Tap out the bubbles, let it cure and peel it out: that silicone is your freshie mold, with a post in each cavity for the hanging hole.

  3. A day or more ahead, shake unscented aroma beads with freshie fragrance oil in a lidded glass jar, about 1 oz of oil per pound of beads, and leave them until they feel dry. Shake in a pinch of mica for colour.

  4. Set the silicone mold on a baking sheet and fill each cavity level with the rim, then heap it slightly: the beads settle as they melt. Brush any beads off the top of each post.

  5. Bake at 300 to 350 F (150 to 175 C) for 10 to 15 minutes, in a ventilated kitchen and without leaving the oven, until the beads have fused but the top still looks beaded. Press with a skewer: done beads hold together.

  6. Let the mold cool completely, then flex it and pop the freshies out. Brush mica into the detail lines if you like, poke the hole clear with a skewer if a bead skinned over it, and hang it on an elastic cord where it touches nothing in the car.

Print details

3 hPrint time
~90 gFilament
1Printed parts
121 × 148 × 22 mmSize (W x D x H)
All print details
Print details
Cast materialAroma beads
Printed parts1
Size (W x D x H)121 x 148 x 22 mm
Print bed needed148 x 121 mm, 23 mm tall
Filament~90 g
Layer height0.2 mm
Infill15%
SupportsNot needed
DownloadZIP: printed caster (STL) + one freshie (STL) + tool master (STL) + print and pour sheet
Added2026-09-26

Pro early access until October 26, 2026, then free with any account.

Make your own tray mold →

Made with the free Tray mold generator. Upload your own model and get the same kind of mold built around it, in your browser.

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.

New to casting? Read the ice cube tray mold guide.

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Questions about this design

How do I make the wheels of the truck freshie black?

Spoon black beads into the two wheel circles first, level with the ring around each hub, then fill the body in red and heap it. After baking, a dab of silver mica on the hubs and the grille bars gives the chrome look.

Can I make a Christmas or fall version of the truck freshie?

Yes, without a new mold. Paint a tree, pumpkins or hearts in the bed with acrylic paint once the freshie has cooled, or glue on small resin cabochons with a heat-resistant glue. Seal paint with a clear spray so the fragrance oil does not lift it.

Where should a truck freshie hang in the car?

From the rear-view mirror or a vent clip, with the freshie hanging free. Fragrance oil marks dashboard plastic and leather, so it must not rest on anything, and some places restrict items hanging from the mirror, so check your local rules.

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