Some wines can contain honey and dairy products. During the process of finishing wine (and many other liquors), certain filtering techniques can also contain non-vegan materials. These filters can be made of sea shells, fish bladders and a few other wacky items. Yuck. That doesn’t apply to every wine or liquor, though. To list them all would be difficult, but if you head over to Barniove, you will find the most detailed and up to date listing of wines, beers and spirits. They’ve got it all (and certainly know more about hooch than this straight edge guy). Go check it out.