Ethan Clarke
Plastic containers are a common feature of modern life, with many households using them to store food. However, there are growing concerns about the health and environmental impacts of plastic. Experts warn that plastic and heat don't mix, and that plastic containers can release microplastics and toxic chemicals into food, especially when exposed to high temperatures. These chemicals, such as Bisphenol A (BPA), have been linked to various health issues, including cancer, reproductive issues, and developmental problems in children. While some plastics are deemed safe for food storage, such as polypropylene, HDPE, and LDPE, others like polyvinyl chloride (PVC) and polystyrene (PS) are considered unsafe. The lack of transparency about the chemicals used in plastic manufacturing makes it challenging to determine the safety of specific containers. The general consensus is that it is unhealthy to store food in plastic containers, and alternative materials like glass or metal are recommended.
| Characteristics | Values |
|---|---|
| Safety | Plastic containers are not inert and can leach chemicals into food. The U.S. Food and Drug Administration considers plastic containers safe, but some experts warn that plastic and heat aren't a good mix. |
| Heat | Heating plastic can cause it to break down and release chemicals into food. |
| Single-use containers | Should only be used once. |
| Freezer-safe containers | Only containers labelled freezer-safe should be used to store food in the freezer. |
| Microwave-safe containers | Only containers labelled microwave-safe should be used in the microwave. |
| Dishwasher-safe containers | Only containers labelled dishwasher-safe should be put in the dishwasher. |
| Fatty or oily foods | Should not be stored in plastic as chemicals are more likely to leach into fatty foods. |
| Acidic foods | Should not be stored in plastic as they chemically react with plastics over time. |
| Scratches | Containers with scratches should be disposed of as they can increase the possibility of microplastic shedding. |
| Repeated use | Can increase the possibility of microplastic shedding. |
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What You'll Learn
- Plastic containers can release harmful chemicals into food and drink
- Heat, wear and acidic foods increase the risk of microplastic contamination
- Plastic containers are not inert and can leach varying levels of metals and chemicals
- Plastic containers are not always safe in microwaves, dishwashers or freezers
- Plastic containers are harmful to the environment and human health
Plastic containers can release harmful chemicals into food and drink
Plastic containers are a common feature of modern life, with many people using them to store food and drink. However, concerns have been raised about the potential health risks associated with these containers. Plastic containers have been found to release harmful chemicals into food and drink, posing a risk to human health.
One of the main concerns is the presence of toxic chemicals in plastic containers. These chemicals can include bisphenols, phthalates, PFAS, and plasticizers. Bisphenols, such as Bisphenol A (BPA), have been found in almost all tested foods and are known to leach into food and drinks. Similarly, phthalates, which are plasticizer chemicals, have been detected in a wide range of products, including plastic wraps and cheeses. PFAS, or per- and polyfluoroalkyl substances, are another group of chemicals found in food packaging that can contaminate food. These chemicals have been linked to adverse health effects, including endocrine disruption and increased risk of chronic diseases.
The release of chemicals from plastic containers can be influenced by various factors. For example, exposure to heat can cause plastics to break down and release unknown chemicals into food and drink. Microwaving or dishwashing plastic containers can lead to the breakdown of polyethylene and polypropylene, potentially resulting in chemical leaching. Oily or fatty foods should also be avoided in plastic containers, as many chemicals used in plastic are fat-soluble and more likely to leach into these types of foods. Additionally, scratches, cracks, and discolouration on plastic containers indicate that the plastic has started to break down, increasing the likelihood of chemical release.
To minimise the risk of chemical exposure, it is recommended to use food-grade plastic containers specifically designed for food storage. Consumers should also pay attention to the resin identification codes on plastic containers, with numbers 1, 2, 4, and 5 generally considered safer choices for food use. Single-use containers should be avoided for food storage, as they are not designed for reuse and can pose health risks. Instead, transfer food to containers designed for storing or reheating meals, and avoid microwaving or dishwashing unless the container is specifically labelled as safe for such use.
While the health risks associated with plastic containers are concerning, it is important to note that the research in this area is ongoing and not entirely conclusive. However, the widespread presence of plastic and the potential for chemical leaching into food and drink highlight the importance of cautious and informed use of plastic containers.
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Heat, wear and acidic foods increase the risk of microplastic contamination
Plastic containers are a common household item used for storing food. However, concerns have been raised about the potential health and environmental risks associated with their use. While the industry maintains that their containers are safe, experts warn of the lack of data and potential hazards when plastic is exposed to heat.
Heat, wear and acidic foods are among the factors that increase the risk of microplastic contamination in stored food items. When exposed to high temperatures, plastic containers can break down, releasing unknown chemicals into the food. This process is accelerated when items are heated in a microwave, even if the container is labelled 'microwave-safe'. It is recommended to avoid using plastic containers for storing hot food and instead opt for heat-safe glass or metal containers.
The risk of microplastic contamination is also heightened by wear and tear on plastic containers. Over time, repeated use, scratching, warping and discolouration can cause plastic fragments to shed into the stored contents. This is particularly common in single-use containers, which are not designed to withstand heating and cooling. It is advised to use food-grade plastic containers that are durable and specifically intended for storing food.
Additionally, certain types of foods can increase the risk of microplastic contamination. Oily and fatty foods are more likely to attract plastic chemicals due to their fat-soluble nature. Acidic foods, such as tomato sauce or pickled items, can also chemically react with plastics over time. Therefore, it is recommended to store these types of foods in glass or metal containers instead of plastic.
While the convenience of plastic containers is undeniable, it is important to be mindful of the potential risks associated with their use. By following guidelines such as using suitable containers for specific purposes, avoiding heat exposure, and being cautious with certain types of foods, consumers can minimise the risk of microplastic contamination and potential health hazards.
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Plastic containers are not inert and can leach varying levels of metals and chemicals
Plastic containers are widely used for storing food and drinks, but they may not be the best option for your health or the environment. Plastic containers are not inert and can leach varying levels of metals and chemicals, especially when exposed to high temperatures.
The Food Packaging Forum (FPF), a Switzerland-based non-profit, has compiled a database of over 900 chemicals "likely" associated with plastic food packaging production worldwide and another 3,400 "possibly" used. Of these 4,300 chemicals, 60% lack hazard data, making it difficult to determine which plastic containers are safe.
Some of the known chemicals in plastic containers include bisphenols A, S, and F (BPA, BPS, and BPF), and polychlorinated biphenyls (PCB). BPA has been banned in baby bottles, sippy cups, and infant formula packaging due to its endocrine-disrupting effects, which can cause reproductive development issues. BPS is not a safer alternative, as it can also lead to health problems. These chemicals can migrate into food and drinks, and their intake may result in cancers, weak immune systems, organ problems, and improper development in children.
Additionally, plastic containers can release microplastics, especially when exposed to heat, wear, or acidic contents. Microplastics are tiny particles less than 5 millimeters long, and their ingestion, inhalation, or skin contact can have potential health effects. One study found that 74% of plastic extracts contained chemicals triggering at least one toxic endpoint, including baseline toxicity, oxidative stress, cytotoxicity, estrogenicity, and antiandrogenicity.
To minimize health risks, it is recommended to use food-grade plastic containers specifically designed for food storage and to avoid single-use plastics. Glass, ceramic, and certain plastics labelled "microwave-safe" are suitable for microwaving. Allowing food to cool before storing it in plastic containers can also help reduce the release of microplastics.
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Plastic containers are not always safe in microwaves, dishwashers or freezers
Plastic containers are not always safe to use in microwaves, dishwashers, or freezers. When it comes to microwaves, it is essential to only use containers that are specifically designed for microwave use. Glass, ceramic, and certain plastics are safe for microwaving if they are labelled as "microwave-safe". Containers with an imprinted microwave symbol can also be used. Single-use containers like margarine tubs, yogurt cartons, and foam-insulated cups should be avoided for microwaving as they can melt or warp, increasing the risk of transferring substances to your food.
Similarly, not all plastic containers are safe for use in the dishwasher. It is recommended to only put plastics in the dishwasher if they have a "dishwasher-safe" label. Washing plastic containers in the heat of the dishwasher can cause them to leach chemicals, so it is often advised to wash them by hand.
When it comes to freezers, it is important to only use plastic containers that are designed for freezer use. These containers should be moisture-vapour resistant, leak-proof, and easy to seal. Single-use containers like ice cream or milk cartons are not suitable for freezer storage.
The safety concerns regarding plastic containers arise due to the potential presence of harmful chemicals. For example, the chemicals Phthalates and Bisphenol A (BPA) are often added to plastic to maintain its shape and pliability. However, these substances have been linked to negative health outcomes, including hormone disruptions, respiratory issues, and cardiovascular diseases. Additionally, the complex chemistry involved in plastic production makes it challenging to know exactly which chemicals are present in food containers.
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Plastic containers are harmful to the environment and human health
The complex chemistry involved in plastic production makes it challenging to determine the exact chemical composition of plastic food containers. While some containers are deemed "food-grade" and safe for use, others may transfer non-food chemicals into the stored content. It is recommended to avoid using plastic containers with codes 3, 6, and 7, as they contain vinyl or polyvinyl chloride (PVC), polystyrene, and potentially Bisphenol A (BPA), respectively.
Single-use plastic containers should be used only once, and it is important to avoid putting them in the dishwasher or microwave, as heat can cause polyethylene and polypropylene to break down, potentially releasing unknown chemicals into food and drinks. Oily and fatty foods should also be avoided in plastic containers, as certain chemicals in plastic are fat-soluble and can leach into these foods.
To reduce the harmful effects of plastic containers, it is advisable to repurpose old containers, minimize takeout orders that use extra plastic packaging, and support companies committed to reducing plastic use. Additionally, individuals can participate in local cleanup days and support legislation aimed at reducing plastic consumption.
While plastic containers may be convenient for food storage, the potential health and environmental risks associated with their use cannot be ignored. It is crucial to make conscious choices to minimize the negative impact of plastic on our health and the planet.
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Frequently asked questions
Yes, it is generally considered bad to store any food or drink, including digestif, in plastic containers. Plastic containers contain chemicals, including Bisphenols A, S, and F (BPA, BPS, and BPF), and polychlorinated biphenyls (PCB), which are harmful to health. The prolonged intake of these chemicals may lead to cancers, weak immune systems, organ problems, and improper development in kids.
Alternatives to plastic containers include glass, ceramic, and stainless steel.
Food-grade plastic containers that are marked with a dishwasher-safe label are generally considered safe for storing food. It is recommended to use containers that are made from resins with the ID numbers 1, 2, 4, and 5.
Oily and fatty foods should not be stored in plastic containers as they attract some plastic chemicals and increase chemical contamination. Acidic foods, such as tomato sauce or anything pickled or citrusy, should also be avoided as they chemically react with plastics over time.
