You might be wondering, what’s the best alcohol for a hip flask? The absolute classic is whiskey, but what other options are there? The consensus among hip flask enthusiasts is that liquor (spirits) is king. This includes whiskey, bourbon, cognac, rum, gin. If you’re so inclined event vodka or tequila in a hip flask is acceptable. Other, lower alcohol drinks, don’t keep well in a hip flask so avoid wine, beer, cocktails, etc. They might lose their taste quickly and damage the flask (smell is one of the first symptoms of a hip flask that wasn’t cared for).