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A standard teaspoon of matcha powder (about 2 grams) delivers between 38 and 88 milligrams of caffeine, depending on quality and serving size.

A 12-ounce can of Diet Coke contains 46 mg of caffeine; a 20-ounce bottle has about 76.

A 20-ounce bottle of Diet Coke contains about 76 mg of caffeine, which is roughly 19% of the 400 mg daily limit considered safe for most healthy.

A standard grande (16-ounce) Starbucks Pink Drink contains about 45 milligrams of caffeine, making it a low-caffeine option compared to brewed coffee.

A standard 8-ounce cup of brewed Lipton black tea contains roughly 55 mg of caffeine, though the actual amount ranges from 25 to 70 mg depending.

An 8-ounce cup of green tea typically contains 28 to 50 mg of caffeine, though the range can extend from 25 to 70 mg depending on the variety.

Three shots of espresso typically contain between 180 and 225 mg of caffeine.

A Venti (20 fl oz) hot Chai Tea Latte from Starbucks contains about 120 mg of caffeine, roughly equivalent to an 8-ounce cup of drip coffee.

A 1-ounce decaf espresso shot typically contains 3 to 16 milligrams of caffeine, depending on the bean origin and decaffeination method used.

A typical 8-ounce serving of Thai tea contains between 30 and 60 milligrams of caffeine, depending on the mix and brewing method.