https://pinshape.com/items/33649-3d-printed-qr-code

https://youtu.be/c44UEefJDlo

http://www.thepaullingworkshop.com/3d-printed-qr-code-coasters/

Redditor 3D Prints WiFi Password as a QR Code Coaster

https://all3dp.com/reddit-3d-printed-qr-code-coaster/

How to 3D Print Barcodes

https://youtu.be/QygonpG70pY

3D Printed QR Codes

https://youtu.be/dT4mj_BAAyM

QR Code Generator for Customizer

https://www.thingiverse.com/thing:46884

Create a 3D Printed QR Code (using Blender)

http://www.instructables.com/id/Create-a-3D-Printed-QR-Code-in-Blender/