Fuel company Z Energy and home improvement giant Mitre 10 has joined the likes of Countdown and New World in vowing to get rid of plastic bags.
Z Energy announced the decision this week and says the ban by June next year will remove 2.5 million single-use plastic bags it gives out each year.
"We may be a fuel company, but we're determined to be at the heart of the sustainability solution," Z's sustainability manager Gerri Ward said.
"Doing something simple like no longer having plastic bags available seems like another small but meaningful step towards a better future."
Mitre 10, meanwhile, announced on Friday that its 81 Mitre 10 and Mitre 10 Mega stores will do away with plastic bags and plastic boot liners by mi-2018 as well.
"As a group of locally owned and operated businesses, we want to do our bit for New Zealand and tackling single-use plastic bags is one of those steps we need to take," says Mitre 10 chief executive Neil Cowie.
"From the outset our store owners were overwhelmingly in support of a move to reduce the environmental impact of plastic bag waste, and all indications show this view is shared by our customers too."
Customers will have the option to purchase a reusable bag for $1 at all stores, Mr Cowie said, and a non-plastic boot liner alternative will also be introduced in the coming months.
Both Countdown and New World have this year agreed to go plastic-bag-free by the end of 2018.