There's a new "travel tag" style Geocoin sold buy a third party, which has a "QR Code" on it instead of the familiar "barcode bug". Scan it and you go to the main Trackable Page on Geocaching.com, not to the individual trackable's page like you might expect.
You can print and laminate a QR code, and attach a TB dogtag. There are several free online QR Code web sites. You could use just the tracking number, or the entire URL for the trackable, for the QR Code.
It is highly advisable to use a Travel Bug Dogtag, attached to an object you wish to track, such as a laminated QR Code tag, since people will recognize that as a trackable item and not Swag. That is also a way to get a tracking number (buying a Travel Bug).