COINOOK — The Smart Shopping Cart Coin & Bag Hook

🦏 COINOOK — The Smart Shopping Cart Coin & Bag Hook

🌟 Like & Collect to keep it handy!

If COINOOK made your shopping smarter, hit that 👍 and ⭐ — your next grocery run will thank you!

The Problem

Picture this: you arrive at the supermarket, grab a cart, and dump your reusable bags in the child seat or the small upper basket — the only flat, protected spot in the cart. But now that space is gone. Eggs? Squished under bags. Fruit? Rolling around the main basket. Your toddler? Competing with a pile of tote bags for the seat. 🤦

Every single shopping trip, the same trade-off: bags vs. fragile items vs. kids.

The Solution

COINOOK replaces your coin and solves the bag problem in one move.

Inspired by the unmistakable silhouette of a rhino, COINOOK is a 3D-printed cart coin that does double duty. Slide the flat end into the coin slot to unlock your trolley — the cute horn-shaped hook stays outside, giving you a dedicated place to hang your empty reusable bags on the side of the cart handle .

Your bags stay accessible but out of the way. The child seat stays free for your kid. The upper basket stays clear for eggs, bread, fruit, and anything delicate. When you're ready to bag your groceries at checkout, just grab them off the hook. Simple. 🎯

One insert. Two problems solved. Zero compromises.

🦏 Why "COINOOK"?

Coin + Hook = COINOOK. It unlocks your cart like a coin, hooks your bags like a hanger. And that curved silhouette? Look closer — it's a little rhino! A friendly shopping companion that quietly does the heavy thinking for you, so your groceries don't have to suffer.

Features

🪙 Universal Cart Coin — Fits standard European trolley locks (Wanzi and similar systems accepting 50c, 1€, 2€ coins)

🛒 Bag Hook — Hang 2-4 reusable shopping bags from the horn while you shop, keeping them off your cart space

👶 Free Your Cart — Child seat and upper basket stay 100% available for kids, eggs, fruit, and fragile items

🦏 Rhino-Cute, Rhino-Smart — That adorable curved silhouette isn't just for looks — it's engineered to hold your bags at the perfect angle

🧲 Stays Put — The flat coin section locks into the cart mechanism; bags hang from gravity — no clips, no magnets, no moving parts

🎒 Keychain Ready — Loop holes in the handle let you attach it to your keyring, carabiner, or bag so you never forget it

🖨️ Support-Free Print — Despite the dramatic horn curve, the geometry is optimized for zero supports — no cleanup, no waste, no stringing under the hook

Print Settings ⚙️

Printer: Bambu Lab A1 mini Slicer: Bambu Studio v2.05.00.66

Parameter Value

Material PLA Basic

Nozzle 0.4mm

Layer Height 0.16mm

Profile 0.16mm Optimal @BBL A1M

Bed Surface Textured PEI Plate

Supports ❌ None

All other settings are default from the Bambu Studio profile — just slice and print, no tweaking needed.

💡 Tip: PLA works perfectly fine for this model. For extra durability, print in PETG — that's what I used for my daily driver. The coin section undergoes repeated insertion/removal stress, and PETG's flexibility gives it a longer life. Same profile settings work for both materials.

Print Stats 📊

Value

Total Filament 0.78 m / 2.37 g

Cost ~€0.06

Model Printing Time 13m 11s

Total Time ~21m 48s

☕ Less than a quarter of an hour of actual printing, less than a single espresso in filament cost. Your little rhino is ready before your coffee gets cold.

Who Needs This? 🎯