Tall? Grande? Venti? Trenta? Do You Get Mixed Up, Too?

Starbucks has invented a language for ordering coffee that only its acolytes truly know. Forgoing the typical small, medium and large format, you have tall, grande, and venti.
But what do those sizes actually mean? How much coffee, and by that note, caffeine, are you ingesting with each cup of Joe?
A tall is 12 ounces, while a grande gives you 16. A venti hot is 20 ounces, adding 4 more if the drink is cold. While trenta means 30 in Italian, the chain throws in an extra ounce on their super-sized cup.
Since grande means large, would that make tall, medium? You’d be correct. There’s a small and it’s called a short. You just have to ask for it by name, which delivers 8 ounces of the energy-boosting elixir.
What’s the most outrageous coffee chain drink concoction you’ve come up with?
The Double Ristretto Venti Half-Soy Nonfat Decaf Organic Chocolate Brownie Iced Vanilla Double-Shot Gingerbread Frappuccino Extra Hot With Foam Whipped Cream Upside Down Double Blended, One Sweet’N Low and One Nutrasweet, and Ice is the longest possible order you could order at Starbucks.  I am totally getting this later today.