I've already described four options for topping up a new wine for storage and maturing. There's a rather ingenious alternative available for anyone who really doesn't want to add anything to the new wine. Glass marbles! After transferring the wine from the fermenter to the storage jar, simply drop in a few glass marbles until the surface level reaches the bottom of the neck of the jar. Of course you should sterilise the marbles first. Glass is completely inert and will not impart any off flavours to the wine. In fact the marbles will have no effect at all, except the desired one of raising the surface level. And of course, they can be used over and over again.
|glass marbles – sterilise before use|