Caro is a brand of caffeine-free roasted grain beverages. It is generally considered a coffee substitute. It is manufactured by Nestlé and was first introduced in West Germany in 1954. It is available throughout Europe as well as other markets including New Zealand and Australia. It is imported to the United States under the name Pero. The name "Caro" sounds like the French word "Carreau", which translates to "diamonds" in playing cards, as seen in the Caro logo (which is also used on Pero).
Caro Instant is a powdered drink available in 50-gram (1.8 oz) containers, whereas Caro Extra is granulated and comes in 200-gram (7.1 oz) jars.
Caro (beverage) Wikipedia
Caro is made up of soluble solids of roasted barley, malted barley, chicory, and rye. It is most often available in health food shops, but can also be found in many major supermarkets.