Sip’n Scream: Jack-o’-Lantern Koozie with Selectable 3-Tone Whistle

Sip’n Scream is a jack-o’-lantern can holder with a three-chamber whistle built into the handle, and a click-stop selector to choose which tones sound.

The whistle

• Three tone chambers, each a different length for a different pitch

• A flared mouthpiece that feeds all three airways

• Wide airways for a loud, clear sound

The selector

Turn the knob on the side of the handle. It clicks into four positions:

• All three: loudest

• High pair: the two higher tones

• Low: the lowest tone on its own

• Off: silent

Can sizes

One pumpkin, four caps on the same thread:

• AU 375 mL (66 × 129 mm)

• US 12 oz / 355 mL (66 × 122 mm)

• US 16 oz / 473 mL tallboy (66 × 157 mm)

• 500 mL energy drink (66 × 168 mm)

Also

• A hollow carved-pumpkin shell: lighter, faster to print, and better insulated

• A black face as a separate part for multicolour printing, with no painting

• A threaded spiral cap with “SIP’N SCREAM” in a second colour

• A D-guard grip with shallow finger grooves

• Lanyard points on the handle and the pumpkin

• No supports on any part

Files

Ready to print: Original Prusa MK4S + MMU3 (HF0.4)

PrusaSlicer projects (settings and colours already set, so you can adjust them for your printer):

• Sip_n_Scream_Pumpkin_MK4S_MMU3_project.3mf

• Cap_AU_375mL_(66x129mm)_MK4S_MMU3_project.3mf

• Cap_US_12oz_355mL_(66x122mm)_MK4S_MMU3_project.3mf

• Cap_US_16oz_473mL_(66x157mm)_MK4S_MMU3_project.3mf

• Cap_500mL_energy_drink_(66x168mm)_MK4S_MMU3_project.3mf

Print one cap to match your can. They all share the same thread.

Settings used

0.25 mm SPEED · 2 perimeters · 5% gyroid · supports off · Prusament PLA · wipe tower on

Multicolour

These are multi-part files that work with an MMU, toolchanger (XL) or any multi-material setup. In PrusaSlicer, the body, face and lettering load as separate parts, so you just assign a filament to each.

Single-colour printer?

• Pumpkin: use Sip_n_Scream_Pumpkin_single_colour.stl. You can paint the face black afterwards if you like.

• Caps: they print top-down, so the lettering is the first 0.8 mm. Add a colour change at 0.8 mm (M600) for two-colour lettering.

Assembly

1. Print Tone_selector_barrel.stl standing on its knob, and Selector_C_clip.stl (PETG flexes best).

2. Push the barrel in from the knob side and snap the C-clip onto the other end.

3. Check it clicks through all four positions. Clear any stringing from the airways for the best sound.

4. Drop in a can and screw on the matching cap.

US 12 oz and 16 oz caps are sized from published can dimensions. Feedback on fit is welcome.

Hand wash only. PLA isn’t food-safe certified; drink from the can, not the print.

Tags: halloween, pumpkin, jackolantern, whistle, noisemaker, can holder, koozie, multicolor, multimaterial, mmu, nosupports, party, 375ml, 12oz, 16oz, 500ml #Printables