Lotus Pagoda Thistle Feeder

Lotus Pagoda Thistle Feeder

A two-piece ornamental nyjer feeder that prints support-free on any FDM printer. The silhouette borrows from East Asian and Greco-Indian classical traditions — a lotus-flared pedestal foot, a fluted columnar body banded with three horizontal moldings, and a tiered pagoda roof crowned by a collared spire finial.

Designed for nyjer (thistle), not just decoration

The two features that matter most for a thistle feeder are baked in:

• Twelve narrow 2.6 × 11 mm slit ports in two rings of six. Small enough that nyjer doesn't spill, slit-shaped so birds extract one seed at a time, and stacked so a small flock can feed simultaneously.
• Six drainage holes through the floor plus a center drain. Wet nyjer molds within a day — this matters more than people realize.

The wide pagoda eaves overhang the ports and shed rain clear of the body. The snap-fit cap opens with a firm twist for refilling.

Two pieces, snap-fit assembly

The base and top mate via a triangular bead on the base and a matching internal groove inside the top piece's skirt. A 7 mm tapered lead-in at the cavity rim eases the bead onto the snap. About 0.5 mm of radial flex during insertion — comfortably within PETG's safe range. No tools required, no glue.

Print profile (Bambu Lab P2S, 0.4 mm nozzle)

Orientation:

• Base prints upright — lotus pedestal on the plate. The chamfered foot prevents elephant foot.
• Top prints rim-down, finial pointing up. Every pagoda eave slopes inward as Z rises, so the entire roof self-supports.

Engineering notes

• Every overhanging surface was audited to confirm <45° from vertical. The only flagged "overhangs" are tiny natural bridges (the 2.6 mm tops of the feeding slits and the 4 mm string-hole top arc), all well within FDM bridging limits.
• All walls are 2.0 mm — five 0.4 mm extrusion lines. Plenty stiff in PETG.
• Snap fit math: bead OD 81.5 mm, cavity ID 80.5 mm, rim flares to 82.3 mm. 0.5 mm per-side deflection at engagement.

Assembly

1. Tie weatherproof cord (paracord or coated wire) through the cross-bored hole in the finial.
2. Pour nyjer into the open base.
3. Align the top, press straight down firmly until you feel the bead click into the groove.
4. To refill: hold the base, twist the top slightly while pulling up.

Maintenance

• Rinse with a 9:1 water/vinegar solution every 2–3 weeks.
• Sun-dry completely before refilling.
• Clear the floor drain holes with a pipe cleaner if seed packs in.

Capacity

About 590 cm³ inside the body — roughly 400 g of nyjer. Refill every few days for an active flock.

Prints in under 24 hours on a P2S. Total assembled height about 215 mm.