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Plastic containers are convenient, so it’s no surprise that many of us use them for everything from leftovers to pantry storage. But not everything actually belongs in plastic. Some foods can stain or degrade the material, while others absorb odors or lose quality when stored this way.

In certain situations, plastic can also break down over time, especially when it’s exposed to heat, acidic ingredients, or oils. That’s why many kitchen experts recommend using alternatives like glass, ceramic, or stainless steel for certain foods and household items.

If you’re relying on plastic containers for everyday storage, here are several items most people store in plastic containers but probably shouldn’t.

food in plastic container — Image Credit: Deposit Photos

Hot Leftovers

It’s tempting to move hot food straight from the stove into a plastic container, but the heat can warp or break down the plastic over time. High temperatures may also increase the likelihood that chemicals leach into food.

Let leftovers cool slightly before storing them, or use glass containers that are designed to handle temperature changes.

Tomato-Based Sauces

Tomato sauce is one of the biggest culprits for staining plastic containers. The acidity and rich color can leave behind stubborn red marks that never fully come out.

Glass containers avoid staining altogether and also prevent flavors from lingering in the container after washing.

Greasy Foods

Fried foods, bacon, and oily leftovers can cling to plastic surfaces. Even after washing, grease can remain trapped in tiny scratches and leave behind lingering smells.

Glass or stainless steel containers are much easier to clean and don’t hold onto oily residue the same way plastic does.

Highly Acidic Foods

Foods such as pickles, citrus slices, vinegar-based dressings, and fermented foods can slowly degrade certain plastics. Over time, acidity may cause plastic containers to degrade.

Glass handles acidic foods much better and won’t react with ingredients.

Alcohol-Based Products

Items such as mouthwash, extracts, and homemade tinctures often contain alcohol. Alcohol can soften or deteriorate certain types of plastic over time.

If you need to transfer these products, glass containers are a safer and longer-lasting option.

Dairy Products

Milk, yogurt, and soft cheeses can absorb lingering odors from plastic containers. This can subtly affect the taste of dairy products, especially if the container has previously held strongly flavored foods.

Glass containers help keep flavors clean and prevent unwanted odor transfer.

Spices and Dried Herbs

Plastic containers aren’t always completely airtight, which means air and moisture can slowly affect the flavor of spices. Over time, this can cause herbs and spices to lose their potency.

Airtight glass jars do a much better job of preserving freshness and keeping flavors strong.

Coffee Beans

Coffee beans are highly sensitive to air, light, and surrounding odors. Plastic containers can sometimes trap smells that affect the flavor of the beans.

An opaque, airtight glass or ceramic container helps maintain freshness and preserve the rich flavor of coffee longer.

Fresh Produce

Storing fruits and vegetables in tightly sealed plastic containers can trap moisture, which encourages mold and faster spoilage. Many types of produce actually need a bit of airflow to stay fresh.

Breathable produce bags or vented containers often work better for extending the life of fruits and vegetables.

Leftover Pizza

Between the tomato sauce and the greasy toppings, pizza can quickly stain plastic containers and leave behind strong odors.

Using glass containers, foil, or parchment paper can prevent stains and make cleanup easier.

Cleaning Supplies

Some household cleaning products contain chemicals that can slowly degrade certain plastics. Storing them in inappropriate containers may weaken the plastic or cause leaks.

It’s best to keep cleaning products in their original packaging or in containers designed for chemical storage.