A Keychain with a Rick Roll spotify code, and a shopping cart token, which you can remove out of the cart.
Print in 0.2mm height, and keep in mind, that you have to change the color mid print, so your code will be scannable.
With 0.2mm layer height, you need to change the filament at layer 13.
I used Pla
Works best, when you print in 2 contrasting colors.
The author remixed this model.