Good Riddles

Question: Draw, fire, or fill me;
I'm still empty.

What am I?

Question: I met a man on a bridge he tipped his hat and drew his cane in this riddle I said his name. What is his name?

Question: If you have a cake, how many pieces of cake can you form with 3 straight cuts?

Question: Two men went into a restaurant. They sat at a table and the waiter came by and asked, "What do you want to drink?"

The first man said, "I'll have H₂0."

The second man said, "I'll have H₂0 too."

The second man died.

Why?

Question: My boots can fit though the green glass doors but my shoes cannot. Sea weed can fit but algae cannot. A tree can fit but a forest cannot. The moon can fit but a feather cannot. Why is this?