Caffeine in pop varies widely by brand, from 0 mg in most citrus and clear sodas to about 55 mg in a 12-ounce can of Mountain Dew.

A 200 ml cup of PG Tips black tea contains about 50 mg of caffeine, roughly half the caffeine of brewed coffee and a fraction of the daily limit —.

Pure peppermint tea contains 0 mg of caffeine per 8-ounce cup, but commercial blends that combine peppermint with black or green tea can add 20.

Standard OxyShred Thermogenic Fat Burner provides 150 mg of caffeine per single-scoop serving.

Oolong tea typically contains 30 to 50 mg of caffeine per 8-ounce cup, though levels can range from roughly 16 mg to 75 mg depending on brewing.

One teaspoon of matcha powder generally contains 38 to 70 mg of caffeine, depending on the quality and origin of the tea.

A single level teaspoon of instant coffee powder typically contains between 30 and 50 mg of caffeine.

One tablespoon of instant coffee typically contains 30 to 90 milligrams of caffeine, depending on the brand, product line.

A single tablespoon of ground coffee typically contains about 60–70 mg of caffeine, though the exact amount varies by bean type, roast level.

A single 1-ounce shot of espresso typically contains about 63 milligrams of caffeine, though amounts vary by bean type, roast.