Plastic Bottles Holding 2.3 Litres Are Least Harmful To the Planet

Using plastic bottles that contain the most liquid for the lowest packaging weight could help reduce plastic waste. From a report: Plastic pollution is a huge problem for the world, with much plastic waste reaching the oceans where it can affect marine life. In recognition of this, many researchers are developing strategies to tackle the plastic waste problem. Now, Rafael Becerril-Arreola at the University of South Carolina and his colleagues have come up with a relatively simple method to make a difference: change the packaging size to maximise its capacity for a given weight of plastic. "We realised we could establish a relationship between supermarket beverage sales and plastic waste," says Becerril-Arreola. "I saw the opportunity to create an impact, and I took it." Becerril-Arreola and his team focused on polyethylene terephthalate (PET), the most common material in plastic bottles. They weighed 187 empty bottles of different sizes from bestselling drink brands to determine the weight of plastic required to produce a bottle of a given capacity. They also compared this against PET waste and drink sales in Minnesota between 2009 and 2013, as the state government there reliably collects waste statistics and its bottled drink consumption is close to the US national average. The researchers found that the most efficient bottles -- those with the greatest capacity relative to the weight of plastic used to make the bottle -- had a volume between 0.5 and 2.9 litres. Bottles of this size are typically bought for on-the-go use or social gatherings. Bottles that were smaller (under 0.4 litres) or larger (over 3 litres) used more plastic in relation to each bottle's capacity.Read more of this story at Slashdot.
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