Postum is a powdered roasted grain beverage often used as a coffee substitute.

Roasted grain beverages are common substitutes for coffee.

Caro is a brand of caffeine-free roasted grain beverages.

The dark-roasted grains used in roasted grain beverages would also, presumably, have high levels of acrylamide.

Inka is a Polish roasted grain beverage.

Several well-known roasted grain beverages are Nestlé Caro, Postum, and Inka.

Orzo is a caffeine-free roasted grain beverage made from ground barley (orzo in Italian, from Latin hordeum).

A roasted grain beverage is a hot beverage made from one or more cereal grains roasted and commercially processed into crystal or powder form to be reconstituted later in hot water.

Roasted grain beverages are popular in Polish (brands Inka, Krakus, Anatol, Kujawianka) and East Asian cuisines, Japan, China, and Korea each having their own versions (usually roasted grains simply steeped in hot water).