Worst: Jerky
Since all goods at Costco are being sold in big sizes, we don’t suggest you buy jerky in bulk. With all the preservatives that are put on a jerky, once opened, it will only last about a week or two, even when placed inside the fridge. So just better stick to the smaller packages.
Worst: Hummus
You won’t need as many hummus as a Costco-sized tub will give you unless you plan on throwing a house party. Just get a smaller sized jar from your nearest supermarket to prevent food wastage.