Next time you're at the supermarket choose one product, and see if there's an alternative option that means you'll be getting more product and less packaging. Easy as.
If you're keen to find out more, check out:
Regional Shopping Guides: A super handy directory of stores in NZ that make it easier to buy in bulk or without packaging. Massive shout out to the amazing Hannah and Liam from The Rubbish Trip for creating this.