Vodka is one of the most diverse spirits in the world. Yes, it’s often flavorless (and intentionally so), but variety in vodka comes from something much deeper: what the spirit is made from.

The Alcohol and Tobacco Tax and Trade Bureau defines vodka as, “neutral spirits distilled or treated after distillation with charcoal or other materials so as to be without distinctive character, aroma, taste or color.” That leaves a lot of flexibility, and distilleries take full advantage of the ambiguities in the definition. By U.S. law, vodka can be made from anything that has fermentable sugars. Once that fermentation is done, it’s distilled a number of times to create vodka.

Some distillers stick with a historical wheat, rye or barley recipe for a fermentable base. Others make use of corn or potatoes. A few get into more obscure bases like grapes, sweet potatoes or pears. Here is what 41 of the more popular vodkas are made from.

Barley

Finlandia

Corn

Crystal Head

Deep Eddy

Prairie Organic

Smirnoff

Tito’s

UV

Grape

Cîroc

Pears

St. George

Potato

Blue Ice

Chopin (also has a rye and wheat version)

Christiania

Grand Teton

Luksusowa

Vikingfjord

Rye

Belvedere

Sobieski

Square One

Sweet Potato

Corbin

Wheat

42 Below

Absolut

Grey Goose

Ketel One

Leaf

Pinnacle

Russian Standard

Svedka

Three Olives

Whey

VDKA 6100

Mixed

Hangar 1 (mix of grapes and wheat)

Leopold Bros Silver Tree (potato, wheat and barley)

Purity Vodka (wheat and barley)

Reyka (wheat and barley)

Van Gogh (wheat, corn and barley)

Zirkova (wheat and rye)

Zyr (wheat and rye)

Burnett’s*

New Amsterdam*

Seagram’s*

Skyy*

Stolichnaya*

* Listed as having mixed ingredients, but do not reveal what that mix is.