Coin/Key for European shopping cart. Form factor between 50 cent and 1 euro coin, compatible with most carts. Easy to put on a keychain and you can pull it out when the cart is unlocked with most systems.
Just a simple and effective design.
The ones in the picture have been printed super fast with a 0.8mm nozzle.
Update 10-04-2024
Check out the Next Generation of shopping cart coins as well in the new version!
https://www.printables.com/model/785080
Update 27-06-2023
Check out the USA (US quarter) version:
https://www.printables.com/model/514395
Check out the UK (Pound) version:
https://www.printables.com/model/514397
Update 15-08-2023
Here are also references to the 1 euro and 2 euro coin. These have similar functionality, but without the extra attachment.
https://www.printables.com/model/485369 → 1 Euro dummy coin
https://www.printables.com/model/485368 → 2 Euro dummy coin
The author marked this model as their own original creation.