Above is a great ad that Trident gum has put out. As you can see they have placed a custom Tag in the lower left region of the ad. This takes any user who "snaps" the tag with their tag reader to the Trident Gum Twitter Feed.
In my opinion this is shows how "with the times" Trident is!
Below is the tag: Try it out on your mobile phone! If you need to get the read go to http://gettag.mobi on your mobil browser