Maya Ellison
Plastic containers are everywhere, and they are convenient, cheap, and versatile. However, they may come with hidden costs. Many plastic containers are designed for single use and are not meant to be reused. Plastic containers have been found to contain harmful chemicals that can leach into food and drinks, increasing exposure to substances linked to health concerns. These chemicals may be intentionally added to enhance certain properties or as contaminants from recycled plastic. While yogurt containers are probably made of polypropylene (#5 plastic) which does not contain BPA, an estrogenic chemical known to be harmful, they may still release other chemicals when exposed to heat, for example, in the microwave or dishwasher. To reduce exposure to these chemicals, it is recommended to avoid using plastic containers for food storage, especially for hot, fatty, or acidic foods, and opt for inert containers made of glass, ceramic, or stainless steel.
| Characteristics | Values |
|---|---|
| Safety | Many plastic containers contain harmful chemicals that can leach into food and drinks, increasing exposure to substances linked to health concerns. |
| Plastic type | Yogurt containers are likely made of polypropylene (PP), or #5 plastic, which does not contain BPA. |
| Reuse | Containers that are not designed to be reused, such as takeout containers, may release chemicals into food when reused. |
| Heat | Exposure to heat, such as in the microwave and dishwasher, can break down plastic, causing the release of unknown chemicals. |
| Alternatives | Safer alternatives to plastic include glass, stainless steel, and lead-free ceramic. |
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What You'll Learn
- Plastic yogurt containers may be safe to reuse
- However, all plastics can release chemicals if reused repeatedly
- Heat intensifies the release of chemicals, so never microwave plastic containers
- Oily and acidic foods can attract plastic chemicals
- Glass, stainless steel, and ceramic containers are safer alternatives
Plastic yogurt containers may be safe to reuse
Plastic yoghurt containers may be safe to reuse, but it depends on the type of plastic and how you use it. Yoghurt containers are typically made from polypropylene or low-density polyethylene, which are considered safer than other plastics because they do not contain bisphenol A (BPA), a harmful estrogenic chemical. However, it's important to note that all plastics contain many different chemicals that can transfer into the food they carry, especially when exposed to heat. Therefore, it is recommended to avoid using plastic containers for hot or fatty foods and to always allow food to cool before placing it in a plastic storage container.
The safety of reusing plastic yoghurt containers also depends on the regulations in your region. In the United States, for example, the Food and Drug Administration (FDA) oversees the safety of food contact substances, and manufacturers are responsible for ensuring proper labelling for intended use. However, experts caution that heat and plastic don't mix well, and that exposure to high temperatures can increase the rate of chemical migration from the container into the food. Similarly, oily foods are thought to attract some plastic chemicals.
To reduce the potential risks associated with reusing plastic yoghurt containers, it is recommended to follow guidelines provided by organisations such as the Environmental Working Group (EWG). The EWG advises against using #7 plastic containers, as they may contain BPA. Instead, they recommend using #1, 2, 4, or 5 plastics for food storage. Additionally, it is important to never microwave food in any type of plastic container and to avoid placing hot food in plastic containers.
While reusing plastic yoghurt containers may be convenient and cost-effective, it is essential to be aware of the potential risks associated with chemical migration. To minimise these risks, follow the tips provided by the Food Packaging Forum, such as shortening food storage time, using inert containers like glass or ceramic for hot and fatty foods, and avoiding small portion sizes to reduce the surface-to-volume ratio of food in contact with packaging.
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However, all plastics can release chemicals if reused repeatedly
While yogurt containers are probably made of polypropylene (PP), or #5 plastic, which does not contain BPA, an estrogenic chemical known to be harmful, all plastics can release chemicals if reused repeatedly.
The Food Packaging Forum (FPF) compiled a database of over 900 chemicals "likely" associated with plastic food packaging production worldwide and another 3,400 "possibly" used. Of those 4,300 chemicals, 60% did not have any available hazard data. Many of these chemicals are proprietary secrets of the manufacturers, and very few have been tested for long-term health effects.
Heat accelerates the process of leaching, so it is advised to avoid microwaving plastic, even if labelled "microwave-safe". It is also recommended to let hot foods cool before placing them in plastic containers. Oily and acidic foods are also thought to attract some plastic chemicals, so it is best to avoid storing them in plastic.
To reduce your exposure to chemicals, you can opt for storage containers made of glass, stainless steel, or lead-free ceramic.
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Heat intensifies the release of chemicals, so never microwave plastic containers
Plastic containers are convenient, cheap, and ubiquitous. However, they may contain harmful chemicals that can leach into food and drinks, increasing exposure to substances linked to health issues. Heat intensifies the release of chemicals, so never microwave plastic containers.
Most food containers, including yogurt tubs, are made of low-density polyethylene (LDPE) or polypropylene (PP). Polypropylene does not contain bisphenol A (BPA), a harmful estrogenic chemical. However, other plastic containers may contain BPA, which is still widely used in food packaging and processing equipment. Even without heat, toxicants naturally leach out of plastic products over time, and heat accelerates this process.
The plastics industry maintains that their containers are safe for use in the microwave, dishwasher, or freezer when labeled as such. However, researchers and experts point to a lack of transparency and data regarding the thousands of different chemicals added to plastics. Many of these chemicals are proprietary secrets of the manufacturers, and few have undergone testing to prove their safety.
When exposed to heat, polyethylene and polypropylene can break down, releasing unknown chemicals into food and drinks. Oily and acidic foods can also attract and absorb plastic chemicals more easily. Therefore, it is recommended to avoid storing or heating such foods in plastic containers.
To reduce exposure to potentially harmful chemicals, it is advisable to use alternative materials for food storage and heating. Glass, stainless steel, and ceramic containers are safer alternatives that do not leach chemicals into food. These materials are also more durable and resistant to degradation.
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Oily and acidic foods can attract plastic chemicals
Plastic containers are widely used for food storage due to their convenience, durability, and affordability. However, concerns have been raised about the safety of using plastic, especially regarding the leaching of chemicals into food. While yogurt containers are typically made of polypropylene (#5 plastic), which does not contain BPA, other plastic containers may contain this estrogenic chemical.
Oily and fatty foods, such as butter, cheese, and meat, can absorb chemicals from plastic containers, especially when stored for extended periods or at high temperatures. Low-Density Polyethylene (LDPE) and High-Density Polyethylene (HDPE) containers are commonly used for food packaging due to their durability and moisture resistance. However, when it comes to storing fatty foods, these plastics may facilitate the leaching of chemicals.
The complex chemistry involved in plastic production makes it challenging to identify all the chemicals present in food containers. While some chemicals may be unknown, others, like phthalates and bisphenols, are well-known additives. These chemicals have been linked to potential health risks, even at low levels, and can act as endocrine disruptors, interfering with hormone production and regulation.
To minimize the risk of chemical leaching, it is advisable to use glass or ceramic containers for long-term storage of oily and fatty foods. Allowing hot foods to cool before placing them in plastic containers can also reduce the likelihood of chemical contamination. While the industry maintains that their containers are safe, experts emphasize the need for greater transparency and data regarding the chemicals used in everyday plastic materials.
In summary, while plastic containers offer convenience and affordability, certain foods, such as oily and fatty substances, can attract plastic chemicals. To ensure food safety and minimize potential health risks, it is recommended to use alternative containers, such as glass or ceramic, for storing these types of foods.
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Glass, stainless steel, and ceramic containers are safer alternatives
Plastic yoghurt containers are typically made of low-density polyethylene or polypropylene, which do not contain BPA, a harmful chemical. However, researchers have found compounds in consumer plastics that are toxic in vitro, and plastic is not a completely stable material. Heat can cause plastic to break down, releasing unknown chemicals into food and drink. Oily foods are also thought to attract some plastic chemicals.
Stainless steel containers are rising in popularity due to their eco-friendliness and durability. They are also odour-resistant, so smells from potent meals will not linger. However, they cannot be used in the microwave or oven, and their opaque nature means users cannot see their contents.
Ceramic containers are non-toxic, safe for food storage, and come in various designs and colours, making them a great addition to any kitchen decor. They are also versatile, being safe for use in the oven, microwave, dishwasher, and freezer. However, they are heavier than other options and can crack if exposed to extreme temperatures.
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Frequently asked questions
It depends on what you mean by safe. Most yoghurt containers are made of low-density polyethylene or polypropylene, which do not contain BPA. However, researchers have found compounds in consumer plastics that are toxic in vitro, but are largely unidentified.
Bisphenol A, or BPA, is a chemical that is known to be harmful. It is an estrogenic chemical that has been found in plastic containers, baby bottles, toys, and sippy cups.
You can check the number on the bottom of the container. #7 plastic containers may contain BPA, while #1, 2, 4, or 5 do not.
It's important to be cautious. Many plastics contain harmful chemicals that can leach into food and drinks, increasing exposure to substances linked to health concerns. Heat accelerates this process, so it is recommended to avoid microwaving or washing plastic containers.
Yes, containers made of glass, ceramic, or stainless steel are considered "inert" materials that release fewer chemicals into food.
