display wall of Kirkland brand oat milk boxes - The Image Party/Shutterstock Costco is known for its warehouses that are jam-packed with practically every product you could dream of, making it a ...

Costco's own Kirkland brand sells bulk packs of oat milk, yet while the product is dairy-free and organic, it is not actually gluten-free. Oats are inherently gluten-free, though people with ...