Gasoline is expensive, but have you compared gas prices to what you’re paying for bottled water? Here’s a hint – a 20 ounce bottle of water at $1.99 is equivalent to $12.74 per gallon – for water. And we pay these prices every day. We’ll spend this hour with journalist Elizabeth Royte, author of “Bottlemania: How Water Went on Sale and Why We Bought It” (Bloomsbury, 2008).