Update: The discount on the 12-pack of tags has been reduced to 20%, bringing the total price up to $15.98. TagsForDroid spoke with us on the issue, saying that they had reserved a set number of packages at the reduced price, and ran out much faster than they anticipated. They apologized to those customers who couldn't get an order in quick enough to take advantage of the deal.

The NFC functionality included in most newer Android smartphones is pretty neat, but the utility is limited by the NFC-enabled hardware you have on hand.