You can fill a litre of wine in the south of France for 60-80p (bring your own container), but it's mainly used for cooking. I drink it although the head hurts afterwards and you wouldn't keep it longer than a week. But even a decent wine would be 4-5 euros. A nice chablis is still like 10-12 euros but over here would be 20+. The French are spoilt when it comes to wine but on the flip side the beer is expensive and the bottles are small.