Carry a small resuable bag
There is a drive in Selangor to get people to use reusable bags when shopping and for that they gave out promotional bags. Somehow I find that rather ironic.
For many people, I’ve found that after they take such promo bags which are usually big, they store them at home and forget about them. When they go out, they don’t carry them because they are unwieldly.
So I find personally that the best way to carry reusable bags is to get one that can be folded up small to fit into your pocket or a handbag. That’s the only way people will use these bags.