There’s no denying it, Costco makes it incredibly easy to feel like you’re saving money. Oversized packages, lower price per unit, and those “too good to pass up” deals can quickly fill your cart.

But buying in bulk isn’t always the smart move. In fact, some items can end up costing you more in the long run if they spoil, lose quality, or simply don’t get used in time. The key to shopping wisely at Costco is knowing what not to stock up on.

Here are the items you’re better off skipping in bulk—and why.

costco produce aisle — Image Credit: Deposit Photos

Bread

Bread is one of those items that feels like a good bulk buy until it starts going stale.

Most loaves only stay fresh for a few days. While you can freeze bread, the texture often changes after thawing. Unless you’re feeding a large household or planning to use it quickly, smaller quantities usually make more sense.

Milk

Milk tends to spoil faster than expected, especially once opened. Even if you grab a great deal on a multi-pack, there’s a good chance some of it won’t get used in time. Unless your household goes through milk quickly, buying smaller containers more often is the safer bet.

Cooking Oil

Large containers of cooking oil may seem like a smart purchase, but they don’t last forever.

Most oils have a shelf life of around six months once opened. If you’re not cooking frequently or using large amounts, that gallon jug may go rancid before you finish it. Using a dark glass oil dispenser bottle can help slow down oxidation and keep oil fresher.

Fresh Produce

Buying fruits and vegetables in bulk sounds healthy and practical, but it often leads to waste. Many fresh items only last a few days to a week. Unless you’re meal prepping for a crowd or have a large family, it’s easy for produce to spoil before you can use it all.

Eggs

Eggs last a few weeks, but bulk packs can still be too much for smaller households. If you don’t use eggs regularly, you may find yourself rushing to use them before they expire or worse, throwing them out.

Skincare and Beauty Products

It’s tempting to stock up on beauty products when you see a deal, but these items have a limited shelf life. Once opened, products like foundation, mascara, and creams begin to break down and can harbor bacteria over time. Buying more than you can use within a few months often leads to waste.

Spices and Dried Herbs

Spices don’t spoil in the traditional sense, but they do lose their flavor over time. That oversized container might seem like a great value, but if it sits in your cabinet for a year or more, it won’t deliver the same taste. Smaller quantities keep your cooking fresher and more flavorful. Storing them in airtight spice jars with labels helps preserve potency longer.

Cheese

Bulk cheese can be a great deal until it starts to mold. Unless you’re using or sharing them regularly, large quantities can go bad before you finish them. Cheese is best purchased in amounts you can realistically consume.

Condiments

Condiments often last longer unopened, but once opened, their shelf life shortens significantly. Items like mayonnaise, ketchup, and salad dressings can lose quality within weeks or months. Buying large containers can lead to waste if they sit in your fridge too long.

Brown Rice

Brown rice is a healthier option, but it has a shorter shelf life than white rice. Because of its natural oils, it can go rancid more quickly. Buying smaller amounts ensures you’re using it while it’s still fresh.

Flour

Flour may seem like a pantry staple worth stocking up on, but it doesn’t last forever. It can absorb moisture, develop odors, or even attract pests if stored too long. Unless you bake frequently, a smaller bag is often more practical.

Ground Coffee

Coffee lovers know freshness makes all the difference. While bulk coffee may be cheaper, it can lose its flavor and aroma over time once opened. If you don’t go through it quickly, you may end up with stale-tasting coffee.

Soda and Carbonated Drinks

Buying soda in bulk can feel like a win until it sits for too long. Over time, carbonated drinks can lose their fizz and flavor, especially if they’re not stored properly. That once-refreshing drink might not be as satisfying months later.

Liquid Bleach

Bleach is another item people don’t realize has a shelf life. It begins to lose effectiveness after about six months, meaning that large bottles may not be as powerful by the time you use them.