In most U.S. grocery stores, you'll only find milk with up to 3.25% milk fat. But leave it to Costco to carry a tier above with this brand of 6% milk.
Woman walking a grocery cart through the dairy department at Costco - Tada Images/Shutterstock Aside from the regular must-buy items from Costco, such as the Kirkland Signature Seasoned Rotisserie ...