The QR codes are now used almost everywhere. They can contain numbers and letters, so you can encode any kind of text information, be it address, phone number, message, name, web link, etc.
Today lots of people use business card recognition apps that scan the card and automatically create an outlook contact. Just imagine letting the others scan your 3D printed stainless steel business card!
If you want to get a polished and fully functional QR tag, set the delivery address to mine (I will provide it by a private message). I need to get the product first to finish it and then send to you.
This QR code tag can contain any encoded message you wish (min. 18, max. 32 characters)
Also, check out this colored plastic tag!! It's cheaper, it's bigger and it's colored! :)