Class and type designations identify the product in the bottle. Federal regulations describe the ingredients and processes used to produce a product of a given class or type. Class and type must be stated on the brand label. For some distilled spirits, the label must include class and type. For others, such as vodka, the label only needs to state the product type. The TTB maintains a list of distilled-spirit classes and types on its website.
Example: Vodka is in the neutral-sprits class because, like all spirits identified as “neutral spirits,” it is a spirit distilled at or about 95% alcohol by volume and bottled at not less than 40% alcohol by volume. The term “vodka” identifies the type of product. The type definition of vodka is that it must be neutral-spirits distilled or treated after distillation with charcoal or other materials so as to be without distinctive character, aroma, taste or color.