It's a pretty common occurrence - for some at least - that they get to the shops, only to remember all their reusable shopping bags are still back in the boot of the car.

So, this wall at Westfield Woden is great for forgetful shoppers.

It's a pretty simple idea - take a bag, leave a bag. Stick your unwanted bags on the wall for someone else to pick up.

Westfield Woden worked with MMD, Damsel and Sprout and Allira's Inklings to bring the idea to reality and it's sure to catch on.

The ACT banned certain single-use, lightweight plastic bags in November 2011.

The Environment, Planning and Sustainable Development Directorate says the ban has reduced the volume of plastic bag waste going to landfill by about one third.

A review in 2017-18 equated that to 55 million plastic bags in 2017-18 alone.