A snake, a snake Snake, a snake Oh, it's a snake Mushroom, mushroom. Who's missing?

An acquaintance of mine has an unusual habit. Every time she receives a bill in the mail, she lights it on fire and then tosses it into the fireplace. Can you guess her name?

I'm stiff when dry and soft when wet, and have a bushy oblong head. I drink from a pot and colour your world, white, black, green, even gold.

What’s black and white And read all over?

A tower of liquid, a cyclone of drink, guiding the flow to the edge of the brink.