You should not drink hot water from plastic bottles because heat accelerates the breakdown of the plastic, causing harmful chemicals like antimony and potentially endocrine-disrupting BPA to leach into the water, along with increasing microplastic shedding, posing risks like hormonal disruption and other potential long-term health issues. Experts recommend avoiding prolonged storage in warm environments or using heat, and suggest glass or stainless steel alternatives.
No it is not deadly. Plastic water bottles are made of Polyethylene terephthalate and the they are perfectly fine for warm or hot water except for the potential of deformation from heat. No harmful chemicals are given off with the exception of when the resin is burned.
As disposable bottles are used repeatedly, an increased amount of chemicals and toxins seep out from the plastic into the water. This process can lead to the accumulation of harmful substances such as di (2- ethylhexyl) phthalate (DEHP) in your bloodstream, potentially resulting in severe health issues.
Hot water bottles can cause serious burns if not used safely. They can also degrade over time. You may have older hot water bottles at home – you can check the manufacturing date by the flower symbol found on the bottle – if so, you may wish to consider replacing them with newer ones.
“The rapid rewarming causes blood vessels to expand too quickly, leading to inflammation,” says Dr Khan. “While hot water bottles don't directly cause chilblains, improper use – such as applying a very hot bottle to cold extremities – can trigger or exacerbate them.”
Avoid using plastic bottles with hot liquids or microwaving them. Heat intensifies chemical leaching, even in BPA-free bottles, which may still contain BPS and BPF. Store plastic bottles away from direct sunlight and heat sources to minimise leaching risks.
Unfortunately, there is growing research that disposable plastic water bottles may increase your risk of heart disease.
Vitamins C and E are antioxidants that can help counter the negative effects of microplastics. Filtered water helps your body flush out microplastics. High-fiber diets help your body get rid of plastic in your waste by promoting bowel movements.
Glass Water Bottles - The Top Pick
Glass water bottles are the top choice to reduce exposure. While they're heavier and - of course - breakable, the toxic exposure risk is simply much lower than both BPA-free plastic and stainless steel.
However, contrary to these findings, the leachate from plastic cups exhibits a higher mass fraction of the vast majority of the tested elements, highlighting an increased propensity for leaching from plastic cups when exposed to hot water.
👉 A peer-reviewed study found that polypropylene bags like Ziploc can release thousands of microplastics and millions of nanoplastics per square centimeter (Especially when frozen or reheated in the microwave)!
If you drink water from a plastic bottle, you are drinking plastic. Yes, even your reusable plastic bottle adds microplastics to your water. BPA-free, dye-free, recyclable, spring, distilled, alkaline, any kind: If it's coming from a plastic bottle, the water has microplastics in it.
Do not use boiling water or hot tap water as both can significantly shorten the life of the hot water bottle and adds to the risk of burns. Hot water bottle manufacturers typically recommend using a temperature no higher than 50-60 degrees Celsius (and even lower for young children) which may take 10-20 minutes.
Yes, providing they are used and cared for responsibly.
There are studies that have been done in countries with extreme heat, like Kuwait, that found antimony, which may affect the liver and gastrointestinal system, leaching from PET plastic water bottles at very high temperatures, like above 120°F.
Do Brita Filters Remove Microplastics? Brita filters can help reduce some microplastics, but they do not remove all of them.
Microplastics may cause changes in the intestinal microbiome, resulting in an imbalance between beneficial and harmful bacteria, which can lead to various gastrointestinal symptoms, such as abdominal pain, bloating, and changes in bowel habits.
A study released in 2024 found the rate of heart attacks, stroke and death was 4.5 times higher in people who had microplastics in the plaque clogging their neck arteries, compared to those who didn't.
Four key signs your heart might be failing quietly, often subtle, include fatigue/weakness, shortness of breath (especially with activity or lying down), swelling (edema) in legs/ankles, and a reduced ability to exercise, which can manifest as congestion (coughing/wheezing) or confusion/memory issues, according to the Harvard Health and Johns Hopkins Medicine.
In summary, the growing body of evidence suggests that MNPs present in bottled water and other consumer products could be linked to a range of chronic diseases, including hypertension, diabetes, kidney stones, and gastric or duodenal ulcers.
That's why it's important to drink water every day. Plain tap water is the best choice. It's cheap, quenches your thirst and has no kilojoules. You can also enjoy sparkling water with fruit for some variety, or in place of less healthy drinks (like alcohol or soft drinks).
Although BPA-free plastic bottles are safer than BPA-containing ones, they should still not be used for hot water. Other chemicals in the plastic can still leach into the water when exposed to high temperatures.
Antimony can be leached from water bottles made of PET plastics. The rate of leaching is low at a storage temperature of 25°C. However, at temperatures of 50°C and above, antimony release can occur very rapidly.
Glass and ceramic mugs are inert, won't react to heat or acidic liquids, and are among the healthiest drinkware options. Both materials do not leach chemicals, so you can enjoy your beverage – whether it be coffee, tea, hot cocoa, or a wintertime cocktail.