It works, but lots of gas is wasted, possibly due to the presence of alcohol. For best results, make sure the wine is very chilled in the sodastream bottle first, filled to the 1 litre mark. Pour carefully and steadily into a chilled wine bottle, held at an angle. Champagne bottles are not required as the the pressure is not great, but re-use of screw tops is inadvisable. I used plastic champagne stoppers with wire cages. Leave at least an inch of airspace below the stopper. The stoppers can be re-used but not the cages. Top up the sodastream bottle with another bottle of chilled wine and repeat. There will always be some wine left over to drink at the end. I used it to improve a dull dry white wine. Cost is about 50 p per bottle for gas, plus the stopper and cage. I could only get gas refills from Comet, who have gone out of business.
