Water
The only problem I've had with water is when I've added flavoring that contained sugar alcohols. Anything that ends in "OL" such al malitol, etc., is know to cause intestinal distress. (A polite word for mega-stinky gas.)
Try adding plain lemon or lime juice if you like a little flavor.
If you need some relief from the gas, try Devrom (available online) or Beano.
No, plain water cannot cause gas. Other things you are eating or drinking can, though. Usually gas is the result of too many carbs or too many sugar alcohols from "sugar free" foods/drinks.
Lora
14 years out; 190 pounds lost, 165 pound loss maintained
You don't drown by falling in the water. You drown by staying there.