It would seem some espresso do have the same caffeine as a can of coke, some even clock in less, but ya on average it seems to have about double the amount.

That said, most coffee shop serve double espressos as standard, so if you factor that in, it seems on average your cup of cappuccino might have four time the caffeine than a can of coke.

That's true, forgot about that part (and why I take them into account as "2 shots" in my max daily coffees).

There's also a couple Nespresso (maybe Keurig and others, too) capsules with double the caffeine content: Kazaar and Napoli.