Concentric Square Coasters — CULTS CU, $1.99 STL
Geometric PETG coaster set, CULTS CU, $1.99 STL — 91% margin at $22 retail.
Concentric Square Coasters — $1.99 CULTS CU, first coaster pick
Coasters are one of the most-searched 3D print categories on Etsy, with over 5,000 active listings and a validated price range of $9.52 to $85.26 per set. 1 Today's pick slots directly into that market: Concentric Square Coasters by Slang (Slang3D), a clean geometric design available on Cults3D under a CULTS CU commercial license for $1.99. 2
Each coaster is 100 × 100 × 5.4 mm — a standard drink-coaster footprint — with nested concentric squares in relief on the top face. The pattern is bold enough to read clearly in listing photos, minimal enough to pair with any home aesthetic, and completely flat on the underside for stable printing without supports.
Quick reference
| Field | Details |
|---|---|
| Model | Concentric Square Coasters |
| Designer | Slang (Slang3D) |
| Platform | Cults3D |
| License | CULTS CU — commercial use permitted, no AI training 2 |
| STL cost | $1.99 (4 files: 3MF, STL, TXT) 2 |
| Dimensions | 100 × 100 × 5.4 mm per coaster 2 |
| Category | Home / Coasters |
| Download | cults3d.com — Concentric Square Coasters |
Note: Cults3D detail pages were Cloudflare-blocked during research. License (CULTS CU), price ($1.99), file count (4), and dimensions are confirmed from search snippet metadata across multiple independent sources. Slice a single test coaster before committing to a batch run.
Print settings
The concentric-square geometry is inherently flat — no overhangs, no supports needed. Each coaster is a quick print, which is exactly what makes this model batch-friendly.
| Parameter | Recommended | Notes |
|---|---|---|
| Layer height | 0.2 mm | Standard; 0.15 mm sharpens ridge definition if your printer is dialed in |
| Infill | 20–30% | Coasters take lateral drink pressure; slightly higher infill than decor |
| Supports | None | Flat geometry, no overhangs |
| Bed adhesion | Skirt or none | 100 mm footprint sits stably; brim optional on glass beds |
| Material | PETG (hot drinks) or PLA (cold drinks only) | PLA softens above ~60°C — use PETG for mugs and coffee cups |
| Nozzle temp | 230–245°C (PETG) / 200–215°C (PLA) | Standard ranges for both materials |
| Bed temp | 70–85°C (PETG) / 50–60°C (PLA) | Standard adhesion temps |
| Est. print time | 45–75 min per coaster | 4-coaster set runs ~3–5 h on a single printer |
| Difficulty | Beginner | No supports, flat geometry, no assembly |
PETG is the correct default here. Most buyers use coasters with hot drinks, and PLA reliably warps and deforms above 60°C. A set printed in PETG holds its shape through everyday use; a set printed in PLA risks distorting under a coffee mug and generating a return or negative review.
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Filament and color strategy
The concentric-square pattern reads well in virtually any color — the relief contrast does the work. That flexibility means you can use up partial spools and still produce a sellable product.
- Matte white or cream PETG — the neutral default; photographs cleanly on any background; easiest to list as matching home decor.
- Slate gray or charcoal — strong contrast, modern aesthetic; performs well in "minimalist home" Etsy searches.
- Terracotta or sage green — on-trend for boho and earthy home decor; look up current Etsy home decor bestsellers before committing to a large batch.
- Dual-color (base + top layer swap) — pause at the last 1–2 layers and swap to a contrasting color to fill the recessed squares. Adds visual pop without multi-extruder hardware; justifies a $3–5 premium over single-color.
Filament estimate: at 20% infill, each 100 × 100 × 5.4 mm coaster uses roughly 20–30 g of PETG. A four-coaster set runs 80–120 g, or $1.60–$2.40 in material cost at $20/kg.
Sales angle and Etsy pricing
The Etsy 3D printed coasters market has over 5,000 listings, with the mainstream selling range sitting at $12–$35 per set of four. 1 One established seller (Truquality, 45,000+ shop sales) moves a set of four for $12.60 on sale, with a regular price of $18.00. 3 That's the volume-seller price floor. A clean geometric design like this one — photographed well and positioned in the minimalist or modern-home niche — can realistically land in the $16–$25 range for a set of four.
Who buys coasters on Etsy: homeowners setting up a new space, wedding registries, housewarming gifts, people who want matching decor at a price below mass retail. The square geometric pattern appeals to buyers who search for "minimalist coasters," "modern home decor," and "geometric coasters" — all active Etsy search terms.
Unit economics — four-coaster set at $22 retail:
| Cost item | Amount |
|---|---|
| STL license | $1.99 (one-time) 2 |
| Filament (100 g PETG at $20/kg) | ~$2.00 |
| Total material cost per set | ~$3.99 (first set) / ~$2.00 (each subsequent) |
| Retail at $22.00 | $22.00 |
| After Etsy 6.5% + $0.20 listing fee | ~$20.37 net |
| Gross material margin (after first set) | ~91% |
The $1.99 STL cost amortizes quickly — after five sets sold, it's effectively zero. At $22 retail and $2 in material, this is a high-margin item if you can turn print time into consistent volume. A 45–75 minute print time per coaster means a four-printer setup can produce roughly eight sets per day running overnight.
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One differentiation move worth doing: because Cults3D pages were inaccessible during the research window, renders of this specific design have limited circulation online. Photograph your first physical print — especially a dual-color version with contrasting inset squares — and you have original product photography that no other seller has yet. That image becomes your listing's primary competitive advantage in a crowded coaster search.
Cover image: AI-generated representative render.
References
- 1
- 2Concentric Square Coasters — Cults3D listing
cults3d.com
- 3
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