Polish company Bak makes Bison Grass vodka. It’s not bison-flavored—it’s grass-flavored (and bison eat grass). The grass infusion leaves a small amount of coumarin, which is a main ingredient in rat poison and leads to liver damage (but then, so does vodka).
Sputnik, a Russian distillery, makes a vodka flavored with “pure organic horseradish.” Wasabi, another kind of horseradish, gives Green Geisha from Oregon’s Hard Times Distillery its distinctive flavor (and burn).
Bakon vodka is infused with the flavor of pork fat. The bottle is bacon-shaped, too.
Another Russian distillery, Vodka Garant, makes a pickle-and-garlic vodka. If that’s not to your taste, American distillery Naked Jay makes a pickle-flavored vodka. No garlic.
Pinnacle manufactures a line of dessert-inspired vodkas, including cotton candy, cupcake, cake batter, and whipped cream.
A company called Three Olives makes this vodka.
Birch syrup is a sweetened tree sap, similar to maple syrup and widely used in Alaska. Alaska Distillery makes a birch syrup vodka. (They also make rhubarb vodka and their most challenging flavor: smoked salmon vodka.)