If you often let half-drunk bottles of wine go to waste, there’s a nifty way to save it. A gadget called Winesave protects opened wine by injecting argon, an inert and odourless gas, into the bottle.

Have you ever gone to pour yourself a glass of wine from a bottle that tasted perfectly good a few days ago, only to find the taste is now completely different — a little sour and even acidic? Or ...