From February, wrappers of Dime, Terry's Chocolate Orange Bar and Toblerone 35g will carry a voucher for £5 off any purchase over £30 from the sport and fashion store.
Consumers will also have the chance to win £10,000 worth of £50 gift tokens. PoS material will include dumpbins and shelf wobblers and trade relations manager Easton Millar predicted a sales uplift of 85%.
The company has also unveiled its Easter 2003 range.
It will back the new Terry's All Gold Imagine egg, which comes in a handbag-shaped box, with a £2m TV ad campaign, while another newcomer Terry's White Chocolate Orange egg gets a £1m TV spend. Terry's All Gold eggs are to be given new packaging.