I joined a swap group on the CMB in which we make a set of ATC's every month, with a different theme. Some months also have a specific challenge. For the month of July, the theme was Play on Words, and the challenge was to use some type of junk mail. I didn't exactly use junk mail, but used an old phone book for numbers of bars. I choe the saying "Dry Martini", so I made exactly that - a dry martini, consisting of sand.