Microplastics from paper cups for hot drinks may raise cancer risk

Drinking coffee or tea from a paper cup is not only wasteful but also puts you at risk of swallowing thousands of microplastics, warn scientists.

A takeaway hot drink can become contaminated with the tiny plastic particles in just minutes, according to a study.

These come from the cup’s inner lining that makes it waterproof – and also makes it difficult to recycle.

Researchers poured hot water into 100ml paper cups and left them left for 15 minutes. 

This is the time, according to surveys, that most people prefer to take to finish their drink.

When the researchers checked the hot water under a powerful microscope, they found an average of 25,000 microplastics per cup. 

Drinking coffee or tea from a paper cup is not only wasteful but also puts you at risk of swallowing thousands of microplastics, warn scientists

Metals including zinc, lead and chromium were also found in the water. These, researchers suggested, came from the same plastic lining.

‘An average person drinking three regular cups of tea or coffee daily, in a paper cup, would end up ingesting 75,000 tiny microplastic particles which are invisible to the naked eye,’ said Dr Sudha Goel, lead author of the study from the Indian Institute of Technology in Kharagpur, a city in West Bengal.

The plastic particles identified were around the size of a micron. The width of a human hair is 25 times this size.

Dr Goel, whose study was published in the Journal of Hazardous Materials, added: ‘Microplastics act as carriers for contaminants like ions, toxic heavy metals such as palladium, chromium and cadmium. 

When ingested regularly over time, the health implications could be serious.’

There is growing concern about plastic found in food packaging, but little evidence on how it affects human health.

The Mail’s Curb the Cups campaign has highlighted how only a fraction of takeaway cups are recycled.