Gas water = bubbly water, like perrier, badoit, vichy, etc. I love those too. If any of you get to go to France, check out the water aisle. What am I saying, the water warehouse. This is like the cereal aisle in the US, choices upon choices, some with higher calcium or potassium, etc. When I was a kid, my dad drank Volvic, my mom Hepar (I think because of the potassium), and I perrier. Currently. we filter our water, as we have do not have municipal water and the well water is a little difficult to stomach otherwise.