Over a 21-day test period, the team found that the bottles released between 1.3 and 16.2 million plastic microparticles per litre.
The researchers highlight that there is still much than needs to be studied around how plastic impacts humans.
G20 nations agree on deal to reduce marine plastic pollution, but details of implementation unclear for now
The deal would be 'the first step' to tackling plastic waste, Hiroaki Odachi of Greenpeace Japan said in a statement.
The average person could be consuming 1,769 particles of plastic every week from water alone.
Mumbai beaches have the highest concentration of microplastic particles, in India, according to a study.
Microplastics have been discovered even in tap water world over, including the far reaches of Antarctica.
The plastic barrier is intended to act like a coastline, trapping about 1.8 trillion pieces of plastic
A bill intended to reduce the volume of microplastics dumped into the ocean was approved by Japan's parliament on Friday
Milind Deora column: Maharashtra's plastic ban is just the beginning, more needs to be done for environment
While plastic is immensely useful in certain industries, it is equally wasteful and damaging in others.
While microbeads make no value addition to our life, they are steadily destroying life as we know it, says Maneka Gandhi.