A few restaurants around town have been taking advantage of the latest thing in wine gadgets — the Coravin wine tool, which pulls wine from a bottle without opening the cork and exposing the wine to air. No one puts the Coravin to better use than Vine and Tap. Ian Mendelsohn’s wine bar has a solid by-the-glass program to begin with, offering four wines on tap and a diverse, Old World-centric list of roughly three dozen others, including special themed flights of three for $15. But there’s another line on the menu that should draw your attention that reads, “We are pleased to offer all of our wines by the bottle in a 3-ounce Coravin tasting pour.” For one sixth of the bottle price, you can get roughly a half glass of any — yes any! — wine Vine and Tap offers. This includes aged gems such as a 1991 Riesling from Schloss Schonborn or the Lopez de Heredia Gran Reserva Rioja from the same year. Eager to taste the differences between a Chassagne-Montrachet and a Puligny-Montrachet? This Coravin thing could get dangerous.