Costco has more than one variety of pasta sauce available for shoppers, and it changes up depending on where exactly your local warehouse is—but there are a few staples available nationwide.

From Rao’s to paper goods, these Costco essentials are so popular and useful that shoppers say they always buy two or more.

At her local Costco, Mara Weinraub, director of Groceries & Shopping, spotted someone leaving with eight sets (aka 16 jars!). The facts are these: Rao’s is the best pasta sauce at Costco, and this ...