Buy: Verka organic yogurt
In Costco, you can buy a 64-ounce tub of Verka organic yogurt for a little more than you would pay for a 16-ounce yogurt at the grocery store. This product has a surprisingly long shelf life and it tastes great.

Buy Verka Organic Yogurt
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Skip: Las Fortunitas tortilla chips
If the Costco by you sells these chips that come in a bag the size of a garbage bag, skip them. This isn’t because of the price. The entire bag costs less than $6, but it’s huge. You’re not likely to finish the whole bag before it goes stale.

Skip Las Fortunitas Tortilla Chips