Fridge after opening? Or back to cellar?

[Innkeeper]

Best method is to have a spare half (375mm) bottle, and a quality stopper. Whan not drinking a full bottle, fill the half bottle to top, and insert stopper. Put bottle into fridge until needed (within a week at most). This requires warming up reds, but is most effective.

You can put it back into your cellar, but don't count on more than a day or two.