Costco's Kirkland Signature purified bottled water does have a few additives in addition to pure H2O, and this is whether or ...

The latest offering from Costco's winning Kirkland brand label is a premade old fashioned cocktail, and it's absolutely worth ...

known for its bulk items and exclusive access (you can't even get a day pass to shop there), was recently spotted offering a bottled ready-to-drink old fashioned under the Kirkland Signature brand.

Niagara Bottling, the company behind Costco's Kirkland brand water bottles, does not add any fluoride to its purified water products -- however, there are multiple other additives present.