I am still fairly new to the diet, but you are advised to eat all your syns 5-15 daily with a maximum of 105 for the week, if you don't eat your syns and you reach a plateau and stop losing weight then you will have nothing to fall back on, if you regularly eat your syns you can cut back on them to kick start your weight loss again if you need to.
I am not sure about how many syns in a bottle of wine, and I don't know whether you can eat your syns all in one day or in a weekend, but someone on here will advise you.
Good Luck with your WI.