Study was partially provided by a soft drinks company that makes sparkling water (the brand used in the experiments). Two of the study authors are also employees of the company,..

Ok sure!

Sparkling water if you're wondering

Water. Plain old tap water, in many places, is perfectly potable and it's almost a guarantee that you - yes you, reading this - are not getting enough. I don't drink enough water, and I pee nearly clear most of the time. Go drink some water.