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A large Diet Coke contains about 70 mg in a 20-ounce bottle or about 123 mg in a 32-ounce fountain serving, depending on where you buy it.

A 12-ounce can of Coca-Cola Classic contains 34 mg of caffeine, which is about one-third the amount in a standard 8-ounce cup of brewed coffee.

A 44 oz fountain Dr. Pepper contains approximately 150–154 mg of caffeine, based on the standard 41–44 mg found per 12 oz serving.

A large (32-ounce) fountain Coca-Cola has about 85 mg of caffeine, while a standard 12-ounce can has 34.

A 32-ounce Diet Coke contains about 123 mg of caffeine, based on the official 46 mg per 12 fl oz serving from Coca-Cola.

A 12-ounce cup of brewed coffee typically contains 113 to 247 milligrams of caffeine, depending on the brewing method, bean type, and brand.

An 8-ounce cup of instant decaf coffee typically contains between 2 and 7 mg of caffeine, far less than the 70–140 mg found in regular coffee.

A 2-liter bottle of Coca-Cola Classic contains about 191 mg of caffeine, based on the standard 34 mg per 12-ounce can.

A 10-ounce cup of brewed coffee typically contains between 119 mg and 206 mg of caffeine.

Everyday Dose mushroom coffee contains 45 to 90 mg of caffeine per serving, typically less than the 100–120 mg found in a standard cup of brewed.