The nine-year-old Woady Yaloak Primary School student will have her pineapple-inspired artwork on reusable shopping bags at Coles supermarkets when it replaces its single-use plastic bags on July 1.

Last week Kassidy, one of 14 winners of the national design competition, was presented with a plaque and a $5000 grant for her school to spend on an environmental or sustainability project.

Also visiting for the assembly was guide dog Willow, who will benefit from sales of the $1 reusable bags with 10c from each bag being donated to charities including Guide Dogs Australia.

Coles joins Woolworths in the supermarket giants’ move to phase out single use plastic bags, with Woolworths having already promised to remove theirs from circulation on June 20.

Coles has pledged not only remove plastic bags, but halve food waste across its supermarkets by 2020, make all packaging of Coles Brand products recyclable, and reduce plastic wrapping on fruit and vegetables.

Surplus food will also be redistributed to SecondBite to be turned in to millions of meals for people in need.

“Single-use plastic bags have become a huge problem for Australia’s oceans and waterways where they cause significant harm to turtles, whales and fish. They also don't breakdown in landfill and require significant resources to manufacture in the first place,” said Planet Ark chief executive Paul Klymenko.

“Experiences in countries like the UK and Ireland have shown the introduction of small charges on plastic bags can end up reducing plastic bag usage by up to 85 percent as shoppers embrace reusable alternatives, and we have every confidence this can happen in Australia too."