Ethan Clarke
Plastic food containers should not be put in the dishwasher due to the potential health risks associated with the practice. The heat from a dishwasher can cause plastic containers to warp or melt, and harmful chemicals such as phthalates and BPA to leach from the plastic. Even if a plastic container is labelled as BPA-free, it may still contain similar compounds such as BPS, BPF, and BPAF, which may have similar adverse health effects. These chemicals can contaminate the water that is drained out of the dishwasher and can also leach into food and skin. While some plastics are designed to be dishwasher-safe, it is always a good idea to check the recycling number on the container and research whether it is safe to put in the dishwasher.
| Characteristics | Values |
|---|---|
| Plastic type | Thin, flimsy, and disposable plastics are not dishwasher-safe |
| Thicker, hard plastics can be washed in the dishwasher | |
| Plastic items with recycling codes 3, 6, and 7 should be avoided | |
| Placement in the dishwasher | Plastic items should be placed on the top rack, away from the heating element |
| The dirtiest side should face the water spray | |
| Items should be angled to allow water to drain | |
| The racks should not be crowded | |
| Temperature | High temperatures can cause plastic to warp or melt |
| High-temperature cycles such as "sanitize" should be avoided | |
| Chemicals | Dishwasher heat can cause harmful chemicals such as phthalates and BPA to leach from plastics |
| Exposure to these chemicals may be particularly harmful to children |
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What You'll Learn
- Plastic containers with recycling codes 3, 6, and 7 should not be put in the dishwasher
- Plastic containers with BPA should not be put in the dishwasher
- Cheap plastic containers, like takeout containers, will warp in the dishwasher
- Plastic containers should be placed on the top rack of the dishwasher
- Plastic containers should not be put in the dishwasher if they are disposable
Plastic containers with recycling codes 3, 6, and 7 should not be put in the dishwasher
Code 3 plastics are made from polyvinyl chloride (PVC), a soft and flexible plastic. This type of plastic is commonly used for household products like shower curtains, plumbing pipes, and clothing. While PVC products can be durable, they are not designed to withstand the high heat of a dishwasher cycle.
Code 6 plastics, or polystyrene (PS), are typically used for disposable food containers, such as coffee cups, packing peanuts, coolers, and to-go boxes. These containers are meant for single-use and are not designed to be exposed to high temperatures or harsh detergents.
Code 7 plastics are often made from a combination of different plastic types or other difficult-to-recycle plastics. This category includes complex plastic mixtures and new, innovative plastics that do not fall into the previous categories. Due to the varying nature of Code 7 plastics, it is challenging to determine their heat resistance, and they may not be dishwasher-safe.
Putting non-dishwasher-safe plastics in the dishwasher can cause warping, melting, or the release of harmful chemicals. It is essential to check the recycling code and manufacturer's instructions before placing plastic containers in the dishwasher. If in doubt, hand-washing plastic items is a safer alternative.
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Plastic containers with BPA should not be put in the dishwasher
Some plastic containers contain harmful chemicals such as phthalates and BPA. The heat from a dishwasher can cause these chemicals to leach out of the plastic. While the amount that would leach into the food is negligible, especially if the food is cold, it is still a health and safety concern. For this reason, it is important to check if a plastic container is dishwasher-safe before putting it in the dishwasher. If it is not labelled as dishwasher-safe, it is best to wash it by hand.
If a plastic container is labelled as BPA-free, it does not include the chemical ingredient bisphenol A (BPA), a compound that hardens plastic. Evidence suggests that BPA can be damaging to our health when consumed. The heat from a dishwasher could cause BPA to leach from plastic, so plastic with BPA should not go in the dishwasher. However, products labelled as BPA-free should still be considered carefully before being used in the dishwasher. Some companies claim their products are BPA-free, but they use similar compounds that may have similar health effects.
To be safe, it is best to avoid putting any plastic containers in the dishwasher, especially if they are not labelled as dishwasher-safe. Instead, wash them by hand with warm soapy water or a mixture of vinegar and water. If you do choose to put a plastic container in the dishwasher, place it on the top rack, away from the heating element. Do not select cycles that use higher wash or dry temperatures, such as the "sanitize" cycle. Try to angle the item so that the water can drain, and do not crowd the racks so that water can spray every surface.
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Cheap plastic containers, like takeout containers, will warp in the dishwasher
If you must put plastic in the dishwasher, it is recommended to place it on the top rack, away from the heating element. Do not select cycles that use higher wash or dry temperatures, such as the "sanitize" cycle. Even if a plastic item is marked as reusable, it should only go in the dishwasher under certain conditions. Put these items on the top rack, far away from the heating component, and avoid using deep clean or sanitizing cycles.
Some plastics are more likely to warp or melt in the dishwasher than others. Thin, flimsy plastics that are designed to be used once, such as water bottles, should be recycled rather than put in the dishwasher. Thicker, hard plastics can be washed in the dishwasher, but it is best to look at the recycling number on the container and research whether it is safe for the dishwasher.
If your plastic containers are warped, bent, or misshapen, it is time to get rid of them. Some items are recyclable, so check with your local recycling service. You can also repurpose food containers to store small items, such as paper clips or hardware.
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Plastic containers should be placed on the top rack of the dishwasher
It is generally recommended that plastic containers be placed on the top rack of the dishwasher. This is because the heating element of the dishwasher is usually situated at the bottom, and the high temperatures generated by the dishwasher can cause plastic items to warp, melt, or shrink. Even plastic items labelled as "dishwasher-safe" can be affected by the heat and may melt if placed too close to the heating element.
To avoid this issue, it is advisable to place plastic containers on the top rack, ensuring they are far away from the heating component. By doing so, you can prevent the plastic from warping or melting and potentially damaging your dishwasher or other dishes. Additionally, it is recommended to avoid using deep clean or sanitizing cycles when washing plastic items, as these cycles tend to use higher wash or dry temperatures, which can further increase the risk of warping or melting.
Some types of plastic are more susceptible to heat damage than others. For example, thinner, flimsier plastics designed for single-use, such as water bottles, are more likely to warp or melt in the dishwasher and should be recycled instead. On the other hand, thicker, hard plastics are generally considered dishwasher-safe and can be placed on the top rack. However, it is always a good idea to check the recycling number on the container and research its dishwasher compatibility before subjecting it to high temperatures.
It is worth noting that some plastics may contain harmful chemicals, such as bisphenol A (BPA), which can leach into food or beverages when exposed to high temperatures. While many manufacturers have stopped using BPA, some companies may use similar compounds with potential health effects. Therefore, it is recommended to look for products labelled as BPA-free and to exercise caution when washing plastics in the dishwasher, especially if they will come into contact with food or children.
Overall, placing plastic containers on the top rack of the dishwasher is a good practice to prevent heat damage and potential chemical leaching. By following these guidelines, you can safely and effectively clean your plastic containers while also maintaining the integrity of your dishwasher and other dishes.
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Plastic containers should not be put in the dishwasher if they are disposable
Even if a plastic container is not disposable, it should not be put in the dishwasher if it is not labelled as dishwasher-safe. The heat of the dishwasher can cause plastic to release harmful chemicals such as phthalates and BPA. These chemicals can then leach into your skin, as well as your food.
If you are unsure about whether a plastic container is dishwasher-safe, look at the recycling number on the container and research it. Thicker, hard plastics are more likely to be dishwasher-safe than thinner, flimsier plastics, which are designed to be used once and then recycled.
If a plastic container is labelled as dishwasher-safe, it should be placed on the top rack of the dishwasher, away from the heating element. It is also important to avoid using high-temperature cycles, such as the "sanitize" cycle, when washing plastic.
Overall, it is important to be cautious when putting plastic containers in the dishwasher, as the heat can cause them to warp or release harmful chemicals.
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Frequently asked questions
Plastic food containers can melt or warp in the dishwasher, damaging the dishwasher and the container. They may also contain harmful chemicals such as BPA that can leach into the food.
Thicker, hard plastics are generally safe to be put in the dishwasher. If the plastic is labelled as BPA-free and 'dishwasher-safe', it should be safe to put in the dishwasher under certain conditions.
Always put them on the top rack, away from the heating component, and avoid using deep clean or sanitizing cycles.
