Rachel Maddow, the MSNBC host, is quite a mixologist. She occasionally pops up on “The Late Show With Jimmy Fallon” to demonstrate various cocktails. On a recent episode she demonstrated a classic martini. While shaking and stirring and measuring she informed Mr. Fallon that vermouth is a wine, therefore expires after two weeks. She encouraged the audience to toss out that old bottle of your granny’s that’s been collecting dust in the liquor cabinet and buy a fresh one. I obeyed. I sampled a fresh bottle. What a difference!