Double Double
"Two For the Price of One" is always an attention-grabbing offer. It's hard to ignore getting seconds free, just because you wanted firsts. "Two-for-One" works well for retail, but not for reflections in a mirror.
Here in prison, I get an opportunity to look in a mirror only when I receive a shower. The shower has four slim windows so the officers can look in, for security reasons, and on the outside of one of those windows is a 6"x6" acrylic mirror.
The convenient mirror is taped there so we can see when we shave (I check my wrinkles too, but that's a whole other blog.) Trimming around mustac...