There is a range of deals on lunchbox food, including easy-peeler oranges and apple packs at £1 each, Princes tuna chunks at the same price and Co-op honey-roast ham at £2.
Breakfast cereals are also on offer and all the deals are being advertised locally and on social media.
Nisa’s promotions manager, Lisa O’Hearne, said: “Research reveals that more than 75% of shoppers are buying a combination of fresh and chilled products to fulfil the lunchtime meal solution.
“With this promotion, our partners are well equipped to support parents in delivering a varied and healthy school pack-up.”
The promotion lasts until 21 September.