Every year 8 million tonnes of plastic ends up in our oceans. That's roughly the equivalent of one shipping container full of plastic a minute. The main culprit is single-use plastic bags. More and more retailers, like Z Energy, are pledging to stop giving out plastic bags. The alternative for customers? Reusable bags. We’ve compared four reusable bags commonly used in New Zealand. Cotton bags, large shoppers, jute bags and paper bags. Get the low down on each bag and find out how many times you need to use each one to minimise the environmental impact of its production.