As much as we like our wine the chances are once in awhile a bottle will not be finished in the evening leaving the problem of how to store it and what to do with it. If you plan on drinking the wine the next evening with your meal than there is no problem. But often the wine will be stored longer and this will make it less the values that make it a great wine to drink. But this does not mean that it cannot be used for something else.
Store that leftover wine in sealed containers such as the original bottle with a wine stopper or in a wine decanters inside the refrigerator. This will slow the aging process and keep oxygen away to keep the wine ready for use in the kitchen. Many cooks make the mistake of keeping their cooking wine on the stove but the heat from the oven will quickly turn the liquid into vinegar.
These leftover wines make much better wines for cooking than the cheap versions labeled for this purpose. Wines labeled as cooking varieties are often too sweet and high in acids and tannins making them have less of a quality flavor for adding to food.