16 Feb 2022 --- Reusable plastic bottles release hundreds of potentially toxic chemicals into the water stream when put through dishwasher cycles, researchers at the University of Copenhagen have found. Professor Jan Christensen and fellow researcher Selina Tisler detected more than 400 different substances from the bottle plastic and over 3,500 substances derived from dishwasher soap in a recent experiment. Speaking to PackagingInsights, they say the findings were very surprising and that their methods could provide product manufacturers tools for regulation in future.