Where Does Water Come From?

Where does water come from? ?

• Water is like 75% of earth. But you can't make new water. You can only reuse the the water thats already on earth. That explains the water cycle and stuff but the same water that's been on earth for millions of years is still being used today. It doesn't make sense to me. Is it possible that some bottled water that someone is drinking was in toilet before? Then flushed down the toilet and brought back some how. Where does the water go when you flush it? It's probably not thrown away. And water travels everywhere because of the water cycle. So it might also be possible that water that was once in a river traveled to the ocean then to the sewer. I dont understand it.

• Answer:

  Water= Sea→Cloud→Hill→Rain→River...............…