Now a third of Costco’s annual sales, store brand Kirkland is a draw for shoppers and a negotiating tool with suppliers.

For me, it’s Kirkland paper towels and maybe ... According to a slew of very upset Costco members on Reddit, Kirkland Signature soy milk is no longer available at their local stores.

According to shoppers, one of Costco's best items is their Kirkland Signature Extra Virgin Olive Oil, "particularly the single origin ones that come in the glass bottles," one specifies. "The quality ...