I found a box of paper tags with a string attatched at Staples pretty cheap. Think is was less than $10 for a 100. I make the tag out with the name of the brew & OG, hang it on my better bottle, then I move it onto my keg when I fill it. Cheap & easy.
I've got another of their pids for my rims tube & it has worked so far without any problems. It's so much cheaper than a love controller, I was worried it was a piece of junk. I'm a firm believer that you get what you pay for.