the boomerang bag...

...and not before time as plastic bags are FINALLY on the way out ( WA is one of the last states to still have free plastic bags at supermarkets).

Our local independent family owned supermarket and greengrocers has a box of bags at the entrance and a HUGE success they are proving to be.
For those who forget their own carry bags they collect a 'boomerang bag' fill it with purchases and  next time they return with their own bag...PRESTO the boomerang bag comes home.
Brilliant.