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A 12-ounce Pepsi contains 38 mg of caffeine, based on PepsiCo’s published product facts.

A full 2-liter bottle of regular Coca-Cola contains about 190 mg of caffeine, based on 34 mg per 12 fl oz and a 67.6-fl-oz bottle.

A 14-ounce brewed coffee often lands around 150–220 mg of caffeine, with beans, grind, and brew method pushing it lower or higher.

A 16-ounce brewed coffee usually lands around 180–220 mg of caffeine, with beans and brew style pushing it higher or lower.

A 12-ounce brewed coffee often lands near 130–180 mg of caffeine, while real-world cups can run from 110 up to 250+ mg.

A 12-ounce can of Mountain Dew contains 54 mg of caffeine, landing above many colas while staying far below a typical cup of coffee.

Two standard espresso shots add up to about 125 mg of caffeine, though café pours can swing from near 100 mg to over 200 mg.

A 16-ounce cold brew often lands between 180 and 300 mg of caffeine, with shop recipes and dilution making the swing.

A 16-ounce serving of Coca-Cola has about 45 mg of caffeine in the U.S.

Most 2-oz espresso shots land around 120–160 mg of caffeine, with the final number shaped by dose, beans, and how the shot is pulled.