For just 7c a bag you can't go wrong. This is a manager's special at Warehouse Sylvia Park I'm not sure if it applies to other stores. There are assorted flavours (fruit, peppermint and strawberry) though the number per bag varies from about 10-14.
There is this cart at the store entrance and also a pallet display further along so there should be plenty left.
The Warehouses stores are getting better and better. I was at the auckland airport store a few days ago rushing to get last minute stuff for an overseas trip, I got a pack of razors advertised as $18 and was happy with that, took it to the counter and it scanned as $4.97, had to go get 5 more packs for that price. Still plenty in stock. https://www.thewarehouse.co.nz/p/schick-quattro-titanium-5-b…