Dark coloured bottle caps contain dye pigments which make it difficult for the infrared lights at recycling processing facilities to identify and sort them as recyclable material.
Among all his success, Mike Smith of Zero Co realised his greatest opportunity was now his biggest problem: how do you solve one of the biggest environmental problems on Earth?
NSW Environment Minister James Griffin said the reason for the single-use plastic bag ban was simple: "It will stop plastic getting into our environment at the source."
The horror of finding a mountain of plastic, rubbish and debris at Everest Base Camp motivated young Gold Coast entrepreneurs to return home and tackle world pollution with a clean sheet.