13 drinks with more caffeine than a can of Red Bull

And you thought Red Bull was bad.

It turns out that while a can of the vilified energy drink has 80 milligrams of caffeine — just one-fifth the maximum amount you should have each day, according to the Mayo Clinic — one small cup of Starbucks drip coffee has more than three times that amount.

Regardless of how you get your caffeine, it's important to keep in mind that it's a stimulant with some positive and negative effects.

And the amount of caffeine that's in various drinks — or even the same drink from a different chain — can vary dramatically.

Here are 13 drinks with more caffeine than a single can of Red Bull:

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One Tall Starbucks coffee

A small Dunkin' Donuts coffee

One 5-hour Energy shot