Supermarket chain Countdown will now allow customers to bring their own containers for over-the-counter food in stores nationwide.
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The move follows a successful trial across 18 stores in the deli, meat and seafood counters.
It's another progressive move from the chain, which announced on Saturday it would restrict the sale of energy drinks to people 16 and over.
Countdown spokeswoman Kiri Hannifin said the feedback from the BYO trial was "overwhelmingly positive".
"We know Kiwis are passionate about reducing single-use plastic," she said.
"Food safety is our absolute priority and, while BYO containers can slow service down a little while the team gets up to speed with the new process, on the whole our customers have been very supportive and know that this is a good change to make," Hannifin said.