Plus, my favorite ways to use them.

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Costco has an incredibly loyal following, and I can see why.

Their products are reasonably priced, regularly change to match the seasons and boast a reliable quality.

a photo of a Costco storefront

Photo:Getty Images

And maybe most notably, they are all available in bulk.

As a household of two, not all of the Costco-sized products make sense for me to purchase regularly.

However, there are certain nonnegotiables that I always stock up on during my quarterly trips.

Of the products I always buy at Costco, the majority are Kirkland Signature brand.

Theyre usually more cost-effective than the other brands they offer, and oftentimes I even prefer the taste.

For this reason, canned tomatoes are something Ialways have in my pantry.

Canned Tuna

Fresh fish can get pretty pricey, and doesnt last very long after you buy it.

More often than not, this includes the Kirkland Signature Albacore Tuna.

Parmigiano Reggiano

Myfavorite budget-friendly thing to buy at Costcois the Kirkland Signature Parmigiano Reggiano.

Parmesan, on the other hand, is not regulated and the taste, texture and quality can vary.

While 2 pounds of cheese may seem like a lot, it lasts a long time.

Dont throw away that rind, either!

Other products can have added sugar or added oils to alter their flavor and texture.

Plus, it’s super nutritious.

Seltzer

Every day, I have a midafternoon seltzer.

I usually pour one over ice, sometimes adding a splash of fruit juice.

Since I go through them quickly, I like to buy them in bulk.

Kirkland Signature items have a loyal following for their low prices, high quality and versatility.

Having a well-stocked pantry and freezer helps me make weeknight cooking easier and more budget-friendly, too.

Costco Wholesale.Kirkland Signature Albacore Solid White Tuna in Water.

Costco Business Center.Kirkland Signature Organic Creamy Peanut Butter.

Costco Business Center.Kirkland Signature Chicken Thighs.

Costco Business Center.Kirkland Signature Organic Ground Beef.

U.S. Department of Agriculture.

FoodData Central.Ground beef, 90% lean, 10% fat.

Costco Buisness Center.Kirkland Signature Sparkling Water.