"I just thought we should have a very simple system to teach people how to weave," she said.
One billion single-use coffee cups are thrown out in Australia each year, equalling more than 60,000 kilograms in waste.
By taking a discarded cup and cutting lines from the lips to the base, the cup makes the perfect frame to weave weeds into a bowl.
"It's a quick way of making a little vessel or basket using a coffee cup and a few natural materials," Ms Cantrill said.