You can find Kirkland options in just about every category, and Costco fans like to muse over which brand-name company is ...

Often made by big-name manufacturers, Costco's Kirkland products offer quality at low prices. But where does the warehouse giant source its bottled water from?

Is Costco’s water really alkaline? “I ended up finding out that for the Costco water, the pH was at 6.0,” she says, pointing out that the bottle advertises a 9.5 pH.

Better watch La Croix, you might get dunked. Better watch LaCroix, you might get dunked. Although LaCroix is a favorite among water-guzzling Millennials, retail giant Costco is wading in with a ...

We've tested and reviewed products since 1936. Read CR's review of the Kirkland Signature (Costco) Water Filtration System water filter to find out if it's worth it.