mysecret.coffee

These could make a fun gift (more fun if you don't tell the recipient what it says).

Create a coffee mug with a personalized message, which will be revealed when you scan the QR code ( or visit the URL) on the mug. You can have as many messages as you wish.

This is an interesting little product hack. So you buy the mug from their zazzle store, but how are they dropping the QR code on each mug? Backend of Zazzle?