
There is a lot of speculation about whether drinking hot water from plastic containers can cause cancer. While some studies have found that hot water may cause plastic bottles to release toxic chemicals, there is currently no evidence that drinking hot water from plastic containers causes cancer. The American Cancer Society has stated that warnings against the use of plastic water bottles were not based on peer-reviewed research, and the FDA has found no evidence to support additional restrictions on plastic products. However, it is important to note that not all plastic water bottles have the same chemical composition, and ongoing studies are investigating the potential health effects of exposure to specific components of plastic bottles.
| Characteristics | Values |
|---|---|
| Is hot water in plastic safe? | Water in plastic bottles is generally considered safe to drink. However, exposure to extreme heat can cause plastic bottles to become unsafe over time. |
| Effect of temperature | Higher temperatures cause more chemicals to be released from the plastic into the water. |
| Effect of time | The longer water is in contact with plastic, the more chemicals are likely to leach into it. |
| Type of plastic | Most water bottles are made of polyethylene terephthalate (PET), which can release antimony when heated. |
| Antimony | Antimony is used in manufacturing PET plastic and can be toxic in high doses. |
| Bisphenol A (BPA) | BPA is an industrial chemical used in plastics since the 1960s. Exposure to high doses is linked to negative health effects, but the FDA states that very low levels in water bottles are safe. |
| Diethylhexyl phthalate (DEHP) | A type of phthalate found in plastic bottles with levels far below the EPA's maximum safe dose. |
| Diethylhexyl adipate (DEHA) | The EPA states that DEHA is not expected to cause cancer or other serious health effects. |
| Studies | The Cancer Research Center in the UK and the American Cancer Society state that there is no peer-reviewed research showing that plastic water bottles cause cancer. |
| Recommendations | It is recommended to keep water bottles covered and not expose them to direct sunlight or high temperatures to minimize the risk of chemical leaching. |
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What You'll Learn
- Plastic bottles are made from a material called polyethylene terephthalate, or PET
- Antimony is used to manufacture PET and can be toxic in high doses
- The hotter the water, the more chemical bonds in the plastic break down
- The FDA has found no evidence to support restrictions on plastic products
- The American Cancer Society says there is no peer-reviewed research to support the claim that plastic bottles cause cancer

Plastic bottles are made from a material called polyethylene terephthalate, or PET
While there is no evidence to suggest that drinking water from plastic bottles causes cancer, it is important to understand the material composition of these bottles, as certain substances can migrate from the plastic into the liquid. Plastic bottles are typically made from a material called polyethylene terephthalate, or PET, which is a polyester plastic. PET bottles have gained a significant market share over the past decade, largely replacing glass bottles, cans, and beverage cartons. This is due to several advantageous properties of PET, including transparency, recyclability, and low migration of substances into the contained liquid.
The process of manufacturing PET bottles involves melting plastic PET pellets with flakes of recycled polyethylene terephthalate (PET) at high temperatures, forming a thick liquid plastic. This liquid is then injected at high pressure into a mould, creating pre-forms that are subsequently transformed into bottles. The pre-forms are cooled and then reheated to make the plastic malleable, after which they are stretched lengthwise with a rod while air is blown into them at high pressure.
One of the critical considerations regarding PET bottles is the potential migration of substances from the plastic into the beverage. While PET is relatively inert, with only minimal substance migration, certain raw materials and additives can migrate into the liquid contents. These include monomers like ethylene glycol and terephthalic acid, as well as catalysts like antimony trioxide. To protect consumer health, limit levels have been set for these substances, and beverage filling plants must analyse and certify the migration levels from PET bottles.
Despite the overall safety of drinking water from plastic bottles, it is worth noting that bacteria and fungi can grow in bottled water if it is left for extended periods. Therefore, it is recommended to clean bottles with hot, soapy water and dry them before refilling to prevent the growth of these microorganisms.
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Antimony is used to manufacture PET and can be toxic in high doses
While water in plastic bottles is generally safe to drink, concerns have been raised about the presence of antimony in Polyethylene Terephthalate (PET) bottles. Antimony is a metalloid element used as a catalyst in the production of PET. It is present in bottled water due to its use in the manufacturing process.
Studies have shown that antimony can leach into the water from PET bottles, with concentrations increasing upon storage, particularly at higher temperatures. The migration of antimony from the plastic into food and drinks can be accelerated by exposing PET bottles to boiling water or microwaving. This can lead to increased levels of antimony in the water, possibly exceeding maximum contamination levels.
The health effects of antimony exposure are a cause for concern. Antimony is considered to have both acute and chronic effects on the human body. When ingested or inhaled, antimony can degrade protein and carbohydrate metabolism and damage the liver, heart, and nervous system. However, it is important to note that antimony trioxide, the form commonly found in PET bottles, is of low toxicity when taken orally.
To address the potential risks associated with antimony, it is recommended to wash PET products before use to remove any surface residue. Additionally, the Swiss Federal Office of Public Health advises that water be bottled in glass rather than PET to reduce antimony concentrations. Prolonged storage of plastic bottles at room temperature is also recommended to prevent exceeding maximum contaminant levels.
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The hotter the water, the more chemical bonds in the plastic break down
There is currently insufficient evidence to suggest that drinking water from plastic bottles causes cancer. However, studies have shown that the hotter the water, the more chemical bonds in the plastic break down, potentially causing chemicals to leach into the water.
Rolf Halden, director of the Center for Environmental Health Engineering at Arizona State University's Biodesign Institute, states that "the hotter it gets, the more the stuff in plastic can move into food or drinking water". This is supported by a 2008 study conducted by scientists at Arizona State University, which found that heat accelerated the release of antimony in PET bottles. Antimony is a chemical used in the manufacturing of plastic and can be toxic in large doses. The study found that in high temperatures, it took significantly less time for water in PET bottles to become contaminated with unsafe levels of antimony.
The U.S. Food and Drug Administration (FDA) has stated that the amounts of chemicals released from plastic into water are too minuscule to cause immediate health problems. However, some scientists argue that the long-term effects of consuming these chemicals are not yet fully understood and that the cumulative impact of consuming small doses over time could be significant.
It is worth noting that not all plastic water bottles have the same chemical composition, and ongoing studies are investigating the potential health risks associated with specific components of plastic bottles. While there may not be conclusive evidence linking plastic bottles to cancer, it is generally recommended to reduce plastic usage and opt for alternative materials, such as glass, whenever possible.
To minimize the potential risks associated with plastic bottles, it is advisable to avoid exposing them to extreme heat and to reduce the overall consumption of plastic-bottled water, especially in high temperatures.
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The FDA has found no evidence to support restrictions on plastic products
While there is ongoing research into the potential link between plastic and cancer, the FDA has not found sufficient evidence to support restrictions on plastic products. The FDA, or Food and Drug Administration, is a federal agency of the United States Department of Health and Human Services. They are responsible for evaluating and regulating materials that come into direct contact with food products. Materials that meet their safety specifications are deemed FDA Compliant or "food grade".
The FDA's role is to ensure that these materials do not adversely affect the food they contact in terms of colour, odour, or taste. They also ensure that the materials themselves are safe for food contact and will not cause harm. There are various plastics that are FDA-certified as food-grade, including High-Density Polyethylene, UHMW, PTFE, and Marine Board. These plastics are durable, tough, and chemically resistant, making them suitable for use in industrial and marine applications.
However, it is important to note that the potential health risks associated with plastics are a growing area of concern. Research has identified hundreds of chemicals in commercial use that are linked to adverse health outcomes, including an increased risk of various cancers, particularly breast cancer. For example, polyvinyl chloride (PVC), a common plastic, contains vinyl chloride, a known human carcinogen. The production of PVC involves toxic chemicals and carcinogens, and its burning can create highly toxic smoke containing carcinogenic dioxins.
Additionally, plastic products often contain additives such as anti-static agents, colorants, curing and foaming agents, flame retardants, and lubricants. Some of these additives, such as phthalates, PFAS, parabens, and aromatic amines, have been linked to potential health risks, including breast cancer. While the FDA has not imposed restrictions, individuals can take steps to reduce their exposure to plastic, such as avoiding plastic in kitchenware and food packaging. It is important to refer to credible scientific resources and cancer organizations for information on cancer risks and to stay informed about the latest research and recommendations.
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The American Cancer Society says there is no peer-reviewed research to support the claim that plastic bottles cause cancer
There is a long-standing claim that drinking hot water from plastic bottles can increase one's risk of cancer. This claim was originally made by Dr. Edward Fujimoto on a television show in Honolulu in 2002. It was later perpetuated by a staffer at the American Cancer Society who shared the report through the organization's social media channels. However, the American Cancer Society has since stated that these viral messages are not based on peer-reviewed research.
The claim suggests that freezing water in plastic bottles can cause a chain reaction that releases a dangerous toxin called dioxin into the water when it thaws. However, this claim has been debunked by the American Cancer Society and Johns Hopkins Hospital, who were falsely cited in the original emails. The Food and Drug Administration (FDA) has also issued a statement denying any claims that substances in plastics can leach into foods.
While it is true that some chemicals can migrate into food and drinks from plastic containers, the levels are very low and are not harmful to human health. The FDA has declared that the chemical Bisphenol A (BPA), which is used to make some plastics, is safe at the low levels that may result from water bottle use. This conclusion is based on a review of hundreds of studies, many of which tested heating the plastic for hours at a time. The regulatory food safety body reported that BPA, DEHP, and DEHA pose no risk to human health from foodstuffs because current levels of exposure are well below the tolerable daily intake.
Additionally, the Cancer Research Center in the UK has stated that the chemicals found in plastic are safe to drink since the levels of exposure are very low. They examined 10 common brands of bottled water stored under different conditions and concluded that temperature and sunlight exposure play a role in the degradation of phthalates over time, with freezing temperatures containing higher levels of DEHP. However, this does not indicate an increased risk of cancer.
In summary, while there have been concerns about the potential link between plastic bottles and cancer, the American Cancer Society and other reputable organizations have stated that there is no peer-reviewed research to support these claims. It is important to refer to credible scientific resources for information on cancer and to avoid misinformation spread through social media or non-accredited websites.
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Frequently asked questions
There is currently no evidence to suggest that drinking hot water from plastic bottles causes cancer. However, studies have shown that heat speeds up the release of the chemical antimony in PET bottles, which can be toxic in high doses.
Antimony is a chemical used in the manufacturing of plastic, and exposure to high doses of it can be toxic. A study conducted by Arizona State University in 2008 found that as temperatures increase, water in PET bottles becomes contaminated with antimony at a faster rate.
Yes, BPA is an industrial chemical that has been used in plastic production since the 1960s. While the FDA has declared that the levels of BPA in water bottles are safe, studies have linked it to negative health effects, including liver and kidney issues.
It is recommended to avoid exposing plastic bottles to extreme heat or leaving them in hot environments, such as a car in the summer. Using alternative materials for food and beverage containers, such as glass, can also help reduce potential chemical leaching from plastic.
Yes, the American Cancer Society, the Environmental Protection Agency, and Cancer Research UK have all addressed this topic. These organizations generally agree that there is no direct link between plastic water bottles and cancer, but they emphasize the importance of ongoing research and credible scientific sources.











































