I dont touch that stuff.

Wine of any quality will be in a bottle. Canned and bagged wine are meant for quantity not quality. Zero air interplay means the wine will not have any chance of aging properly, thus only has potential to degrade. That means it HAS to be loaded with preservatives.

Additionally, wine is extremely acidic (relatively) and requires a special coating on the inside of any bag or can to keep it from eating away at the container. I don't have any data on this, but can only imagine that some of that coating gets into the wine.

Just drink whiskey or tequila if you're thinking about drinking shitty wine IMO