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Most 12-ounce soft drinks contain 30 to 55 milligrams of caffeine, far less than an 8-ounce cup of coffee which has 80 to 100 milligrams.

Most popular sodas contain 30 to 55 milligrams of caffeine per 12-ounce can, though amounts vary by brand and type.

Brewed coffee has 2–4 times more caffeine than soda: a typical 8-oz cup of coffee contains 95–200 mg of caffeine.

Most root beer is caffeine-free, but Barq’s stands out with about 22 mg per 12-ounce can, less than a typical cola.

Rooibos tea is naturally caffeine-free, containing 0 milligrams of caffeine per cup, unlike traditional teas from the Camellia sinensis plant.

An 8-ounce cup of regular brewed coffee contains roughly 95 milligrams of caffeine on average.

Coffee generally contains more caffeine than Red Bull. An 8-ounce cup of brewed coffee has 80–200 mg, while an 8.4-ounce Red Bull has 80 mg.

A 500 ml can of Red Bull contains about 160 mg of caffeine, based on the standard caffeine concentration of 32 mg per 100 ml.

A standard 250 ml can of Red Bull Energy Drink contains 80 mg of caffeine, roughly equivalent to a cup of home-brewed coffee.

A 12-ounce can of Prime Energy contains 200 milligrams.