The Government is expected to announce a ban on plastic bags tomorrow.
Associate Minister for the Environment Eugenie Sage is set to make a "significant" announcement on the environment in Wellington tomorrow morning.
Earlier this year Sage said it was her preference to ban single-use plastic bags and said she wanted to phase them out rather than put a levy on them.
Companies around the country have been announcing the end to the use of single-use plastic bags throughout the year.
In June, 12 companies marked World Environment Day by committing to using 100 per cent recyclable packaging by 2025.