Real-life cryptocurrency recieve implimentations

I'd love to hear of the ways people in the community have found to receive payments! A little while ago, for example, I 3D printed an XRP coin (similar to the image below), and put a qr code onto the back of the coin, so I could literally keep the coin in my wallet with my change, to be able to take payments through that.

Aside from showing a wallet address on a phone screen, what are some clever ways you have thought up/implemented to receive payment?

[src. me @benabbott]