The promotion is designed to boost sales in the pre-Christmas sales for a brand which already has 63% of its volumes during December.
A promotional neck-collar will feature details on how to enter the competition and the recipe for the Snowball cocktail.
Brand manager Paul Curry said: “Warninks is synonymous with the festive season and witnessed record sales last Christmas.
“As a way of retaining our loyal customers and attracting new drinkers to the category, we have launched a promotion to reward the consumer and create added value for the retailer.
“The recent movement into retro-cool products and styles has benefited the brand and we expect to see this trend continue.”