Q-tip Cup — Fluted Cylinder with Snap-Fit Lid
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Ø69 × 60 mm fluted cup that holds ~250 standard cotton swabs, with a faceted gem-top lid that snaps on with an audible…
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- Printables
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- Bathroom
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- Creative Commons — Attribution
A fluted Q-tip cup with a friction-snap lid. Holds about 250 standard 75 mm cotton swabs in its Ø65 × 58 mm inner cavity. Inspired by a Doric column — 24 shallow concave vertical flutes wrap the cup wall; the lid is a flat disc topped with a faceted octagonal "gem" dome that doubles as the lift handle.
Closure (snap-fit, re-openable, audible click). The lid has a downward plug that fits inside the cup mouth with a 0.10 mm diametral slip. A small annular bead 3 mm up the plug clicks into a matching groove just below the cup rim. Four axial slits cut the plug into four 90° petals that flex inward to let the bead pass on close / open. The bead's lower face is chamfered at 30° from vertical so it self-engages and prints cleanly on the lead-in overhang.
The lid disc sits flush on the cup rim when seated.
Dimensions
Part | Outer Ø | Height | Notes |
Cup | 69 mm | 60 mm | inner Ø 65, wall 2.0 mm |
Lid | 69 mm | 2.5 + 7 disc | plug Ø ~64.9, dome height 7 mm |
cup — open end UP on the bed. Floor first, walls climb up. No supports.
lid — plug DOWN on the bed (the lead-in chamfer face on bed). The four slits print as clean vertical voids. The bead's lower flank is the only overhang and is angled at ~30°.
0.2 mm layers, 3 walls, 15 % infill. Any PLA / PETG. Two parts print in ~2.5 h combined on a Bambu P2S.
Tuning the snap. The bead's radial interference is 0.30 mm (0.60 mm diametral). If V1 won't seat → drop bead_radial to 0.20. If V1 comes off too easily → raise to 0.40. Both knobs live at the top of qtip_cup.scad.
Parametric. Edit the variables in the SCAD to retune the cup diameter, height, flute count, lid dome size, snap interference, and slot count. Everything downstream (groove position, bead geometry, plug Ø) is derived so re-rendering with a different cup_od or cup_h just works.
Photo gallery shows the printed cup + lid (yellow PLA): one shot of the lid set down next to the open cup so you can see the plug + slits + bead, and one of the lid snapped on showing the faceted gem dome.