Pam mentioned this once, and it's a really accurate description -- Bangkok is like a giant $1 store. Nearly everything costs roughly a dollar or under. It doesn't matter if it's a full entrée or a simple beverage. They're each about a dollar. 34 baht is a dollar and nearly anything you might want to eat ranges from 20-45 baht.
That brings me to my next point. There was some curiosity before we left the states about whether a Thai Iced Tea is simply called an Iced Tea if you're in Thailand. I HAVE THE ANSWER! It's called an Iced Milk Tea. They seem to generally have 2 kinds of tea at most low budget restaurants, green tea or red tea. Red seems to taste like the Thai iced tea we're familiar with whether it has milk in it or not. And yes, it's roughly a dollar depending on where you buy it.