Egg producer Stonegate has teamed up with Nestlé for a nationwide on-pack promotion of peanut butter. American Style Sun-Pat Super Smooth peanut butter samples will be inserted into the lids of Stonegate Weekender egg packs ­ which will also carry a 40p money off coupon for Sun-Pat. Stonegate said the first such promotion for Tiptree marmalade resulted in a 69% uplift in egg sales. {{P&P }}