A regular-strength 5-Hour Energy shot contains 200 mg of caffeine, while the Extra Strength version delivers 230 mg.

A single scoop of pre-workout typically contains 150–300 mg of caffeine, roughly equal to 1.5 to 3 cups of coffee.

Four standard 1-ounce espresso shots contain about 252 mg of caffeine, based on Mayo Clinic’s 63 mg per shot — well below the FDA’s 400 mg daily.

Mountain Dew’s 12-ounce can contains 54–55 mg of caffeine, roughly half the 80–100 mg in an 8-ounce cup of brewed coffee.

A 16-ounce Pumpkin Cream Chai Tea Latte from Starbucks has about 95 mg of caffeine, while homemade versions typically range from 30 to 50 mg.

Four 8-ounce cups of brewed coffee contain about 400 mg of caffeine, which is the FDA’s suggested daily limit for most healthy adults.

A standard cup of matcha contains 38 to 88 mg of caffeine per teaspoon (2 grams), with most servings falling in the 60–70 mg range.

A 32-ounce Dr. Pepper contains about 112 mg of caffeine, based on the standard 42 mg per 12-ounce serving cited by major health sources.

A 1-ounce piece of dark chocolate (70–85% cocoa) has about 22–23 mg of caffeine; milk chocolate has about 6–7 mg; white chocolate has nearly none.

An 8-ounce glass of iced tea typically contains 20 to 60 mg of caffeine, depending on the tea type and brewing method.