Microplastics have turned up in places that would have seemed implausible just a decade ago: deep ocean water, Arctic ice, human blood, lung tissue and, as a 2026 study confirmed, the placenta. The picture that research is assembling, while still incomplete, is one of pervasive, low-level plastic exposure with health implications that scientists are still working to fully characterize. What's becoming clearer is that some of the exposure is happening at home, in the kitchen, through the everyday tools most people use without a second thought. Here are four of the most common offenders.

Microplastics are also commonly found in our everyday kitchen products. Below I found four potential microplastic sources hiding in my kitchen and microplastic-free alternatives to replace them with. If you have these in your home, give these swaps a try.

1. Plastic food storage containers 

When I went through my storage container cabinet, I found several plastic containers. Some I use solely for storing dry goods, while others are reserved for leftovers in the fridge and reheating in the microwave. The latter claim to be refrigerator-, dishwasher- and microwave-safe, but they all show signs of wear and are definitely due for replacement.

A September 2024 study found that of the 14,000 known food contact chemicals present in food packaging, 3,601 -- or approximately 25% -- were detected in humans. Specifically, 235 FCCs in materials that come into contact with food have been found in humans, including plastic compounds.

There is also particular worry regarding the use of microwaves and plastic containers. A June 2023 study concluded that heating a plastic container in the microwave resulted in the highest release of microplastics and nanoplastics into food, compared to refrigeration, storage at room temperature and other uses. However, refrigeration and room temperature storage can still release up to billions of microplastics and nanoplastics into their contents over the course of six months. Nanoplastics are even smaller than microplastics, measuring less than 1 micron, making them potentially more damaging to the human body. 

This is especially concerning with plastic takeout containers that don't specify they're heat-safe, and even when they do, that claim might just be marketing jargon. This year, it was reported that Rubbermaid is being sued for claiming that its plastic containers are microwave and freezer safe when, allegedly, they still release microplastics into food. A representative for Rubbermaid did not immediately respond to a request for comment.

An August 2024 review determined that even during freezing and thawing, microplastics can be released from the inner surface of food containers. Another concern is that when plastic is frozen, pieces can break off the container and contaminate your food.

While BPA-free containers, which don't contain the industrial chemical bisphenol A, may be better because you avoid potential health effects (though, again, more studies are needed), glass containers are your best bet. 

The swap for plastic food storage containers

I plan to replace my current plastic containers with glass ones. I've already swapped a few with the new Tupperware Voila collection -- safe for the oven, microwave, freezer, dishwasher and under the broiler (with the lid off) -- which the brand kindly sent me to try. However, I also want to stock up on smaller containers.

2. A black plastic spatula 

Like plastic containers, your plastic kitchen utensils can also release microplastic particles into your food, as reported by a June 2024 systematic review. 

I use wooden cutting boards, metal cutlery, a silicone spatula solely for mixing room-temperature ingredients and wood and metal cooking utensils, so I thought I was in the clear with plastic utensils -- until I spotted one thing: a black plastic spatula. I know I should have gotten rid of it by now, but it's the perfect width for flipping pancakes and fried eggs. Writing this article is the wake-up call I need. 

The swap for a plastic spatula 

I'm planning to replace my black plastic spatula with either a metal or wooden one. I already have several wood spatulas, but none are wide enough, so I might opt for a stainless steel fish spatula, such as the OXO Good Grips Stainless Steel Fish Turner ($18) or the Victorinox 40415 Turner Slotted Wood ($54). 

3. My non-stick air fryer

I have the Philips 3000 Series air fryer, and upon researching its composition, I was surprised to find that Philips air fryer parts are mostly coated with non-stick PTFE, a type of plastic.

Philips states that this is a common coating compliant with existing legislation on food contact materials. However, a June 2024 study found that PTFE-coated cookware, like my air fryer, can still release microplastics and nanoplastics if the coating is scratched by hard, sharp utensils or used at higher temperatures.

The swap for a plastic-coated air fryer

CNET's pick for the best air fryer overall is the Ninja Crispi, which is made of glass and free from PFAS and PTFE, thanks to its crisper plate that uses a nano-ceramic coating, not plastic. I will be adding this to my holiday wishlist. 

4. Tea bags 

I found dozens of tea bags in my designated tea jar and the kitchen cabinet where I store extra boxes, but I was shocked to learn they didn't just contain my favorite teas. 

A February 2025 review found that tea bags are the greatest contributors of microplastic particles to hot tea when the bag and string are steeped, as more than 1 billion microplastics and nanoplastics can be released into the liquid. It also doesn't matter whether the tea bags contain plastic that's used to heat-seal the bags or are biodegradable, as the latter can still be created with plastic. 

Upon examining all my tea bags, I found that most of them claim to be compostable, which means they're made from plant-based materials and don't contain plastic. However, I do have some tea bags that lack this label, which means they may contain microplastics.

If you're wondering about the difference between compostable and biodegradable, not-for-profit environmental company Oceanwatch Australia says compostable products are made with organic elements that can break down over time in the right environment, like in a compost bin, while biodegradable products can be made of either plant-based materials or petroleum-based plastic (which could leave behind microplastics).

The swap for tea bags that may contain microplastics

Instead of relying on non-compostable tea bags for a hot beverage, I can choose loose-leaf tea instead. I already have stainless steel tea infusers that I can use for steeping. To ensure that nothing leaches into the water I use to brew my tea, I can use a glass electric kettle, such as CNET's favorite OXO Adjustable Temperature Kettle ($120). 

My final thoughts

While there's no need to panic and hurriedly replace every single item that's plastic in your kitchen, as more studies are required to confirm health effects, there's no harm in slowly swapping out plastic kitchen items for those that are silicone, wood, metal or glass, especially if you're heating, refrigerating, dishwashing or freezing them. After all, a glass item a day could keep the microplastics away.