Perrier, the sparkling water from France, recently introduced an 8.5 oz can.
Very attractive, not quite up to Red Bull, who spent a year designing their can, but still, very good.
The 8.5oz serving is perfect.
I approve.
However, the flavored ones (grapefruit, lime) diminish the integrity of the sparkling water, leaving it foamy. I find this to be true for all sparkling waters, regardless of brand.