Surprise your visitors with a fashionable, 3D-printed, surprise coaster.

Not only are they fashionable - but a surprise is waiting for the guest brave enough to scan them…

The QR code leads to https://rb.gy/a2r9o (in order to not give away the secret right away), which will lead to https://www.youtube.com/watch?v=dQw4w9WgXcQ

One version is for white-only (to manually paint black afterwards).
Second version with a pause command - so you can change filaments manually.