I’m with Benedict regarding the microwave & red wine. 30/40 secs, bottle on it’s side with cork in but foil removed. Then stand it up for half hour or so on kitchen worktop to even out warm spots. Obviously not for anything with a sediment.
Decanter: I use TWS decanter (which seems to have vanished from website) it’s great, and fits in the dishwasher. Because it’s not all posh I can use it all the time.