The prize comprises a week’s stay on a private Scottish estate for up to six people, with opportunities to go stalking, fishing or hill-walking.
Other prizes of a “perfect day” in Scotland are a golf day at St Andrew’s, a weekend in Edinburgh for Hogmanay or a stay at Dalhousie Castle.
The promotion runs through March and April on single 50cl cans and 12-packs.
Packs will drive consumers to a website to enter the competition.
John Edwards, marketing director at Jygsaw Brands, said: “The promotion celebrates McEwan’s Scottish heritage and will help retailers to drive more trial and sales in the ale category.”