Jamie Forsyth's favoured approach is to "jump off a cliff and build a plane on the way down'".

It was his mantra when he co-founded reusable coffee cup business KeepCup with his sister Abigail Forsyth and he's used the same method to launch Returnr which seeks to address waste in takeaway food packaging.

Returnr operates through customers borrowing a metal bowl from participating outlets for a fee of $5 and once used they can bring the bowl back to the cafe rinsed on their next visit to exchange for a new bowl.

Jamie Forsyth with one of his returnable bowls. Credit:Chris Hopkins

Forsyth also co-founded the Bluebag chain of cafes in Melbourne and he says this experience provided the inspiration for both Keep Cup and Returnr.