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The ice-cream maker Haagen-Dazs and Austrian Postal Service launched a series of stamps with branded artwork and ice-cream flavor. "They infused flavors like Cookies & Cream, Macadamia Nut Brittle and Strawberry Cheesecake into the adhesive on the back. As you licked the stamp, you actually tasted the flavor! For every 10 scoops of ice cream purchased, a book of stamps was distributed as part of a loyalty program. Which meant consumers could experience other flavors, sans the extra calories."
-- TBWA
Earlier:
Flashback: Poster Stamps
Smelly Postage Stamps
Stamp Advertising Is Back