The instant-win scratchcard promotion, through Caspa, will run in more than 500 schools but with a sole focus on its rebranded flavoured water range, Simply. On its debut, the campaign ran on cans and bottles of fizzy drinks Tizer and Irn Bru.
Promotional kits, containing 200 scratchcards, related prizes and POP, will be sent to each participating school from this month.
Pupils who buy a Simply product from the school tuckshop or canteen will get a scratchcard. They have a one-in-five chance of winning one of 50 lower tier prizes, including pens and drawstring backpacks.
The top prize of a Zen MP3 player is on offer to 20 winners across the country.
As an incentive for schools to back the promotion, a Zen MP3 player is being offered to the person responsible for the best POP display.
The range includes repackaged Simply Citrus and Simply Clear, as well as new Fruity and Still variants.