Most Wal-marts have them. They're about 10 bucks or so, depending if they are on sale or not. I started engraving our TTR dates on ours when we get back from a trip.
no need for more sets... sometimes I wonder if our bubbas have traveled more then we have. We take them things everywhere.
straws local sex shop has them as novelty/party favor items or if you have a Spencers up there, I think they have them also.
Damn...this gives me an idea of how much I really drank since I was using my bubba for rum n coke. Shake it off liver, we're heading back soon.