Good Riddles

Question: There are two sisters: one gives birth to the other and she, in turn, gives birth to the first. Who are the two sisters?

Question: What goes in the water black and comes out red?

Question: I'm light as a feather, yet the strongest man can't hold me for more than 5 minutes. What am I?

Question: Is an older one-hundred dollar bill worth more than a newer one?

Question: Two girls ate dinner together. They both ordered ice tea. One girl drank them very fast and drank five of them in the time it took the other to drink one. The girl who drank one died while the other survived. All of the drinks were poisoned.

Why did the girl that drank more ice tea survive?