Does anyone know if we can have these? They are "lightly" carbonated like RockStar?

Personally, I'm staying away from all carbonation. The discomfort most people report from it far outweighs any benefit or pleasure it might give.

FWIW, I drink lightly-sparkling flavored water frequently with no problems or discomfort. My nutritionist is aware of this and hasn't cautioned me away from it, though she did chide me to let my occasional Coke Zero (usually when trying to stave off a migraine) go mostly flat before drinking it.

i tried a SF red bull & didn't get far. aside from severe bloating, i had some pain in my left shoulder and that was only after a few sips. do miss the carbonation "bubbly" drink - espeically in the summer.