Water Prices?

 I always see at vending machines at my school with water in them. But something that gets to me is the price. It ranges from $1.00-1.25. I don't understand it. For a natural resource you pay that much. Might as well go to your sink and fill up an aluminum water bottle than to pay for that. It's horrible.
 Yes, I know you have to make some money from the manufacturing of the bottle itself, but how much does plastic cost considering most of it is being redeemed for money to (hopefully) be used again.
  But when you think about it, water is a natural resource. There is springs and oceans filled with gallons upon gallons of water. I know that there aren't as many "springs" as oceans and oceans are made from salt water so it isn't useable. But springs are everywhere. They aren't that rare to be worth $1.25. If you look at the side of a Poland Springs water bottle, it lists all of the springs where the water came from. There is about 15-20 of them at least.
  But yet again, something feels strange about this water coming from different "springs" shouldn't the company find one or two and just stick with it? And when it comes to mind all water is the same and could be coming from the same springs and there is different pricing. The marketing of water must be hard because you cannot really describe how your companies water is better than yours. All water is pure (at least we hope). So the only way they can make profit is to sell it for cheap. Your better off buying water in packs.