Unlike other spirits, vodka is defined more by how it is distilled than it is by what ingredient it is distilled from. Indeed, vodka can be made from almost anything that can be fermented. But HOW it is distilled is A LOT. The basic idea is to distill the fermented liquid successively until it is neutral (i.e., without flavour) or nearly so. That said, some vodkas aim to reveal their base ingredient, which is a trend we like. And while being flavourless may seem like a negative, that negative often turns positive in cocktails where vodka brings the heat but lets the other flavours come forward unconfused.