Importantly, Costco also sells Kirkland Signature natural spring water ... so those who are wary of fluoride should double-check that the water bottles at their Costco are labeled as "purified ...

If you’re paying extra for bottled alkaline water—which has a pH above 7 for increased hydration—you might want to think ...

A measure of how effectively the filter removed flavor taints, along with the resulting odor taints, that CR added to plain water with minimal intrinsic flavor and odor (the "control" water).

Close up of Kirkland Champagne Brut bottles sitting on a shelf - The Image Party/Shutterstock ...