In a recent e-mail blast, Caribou Coffee announced its latest promotion: customers can save 50 cents on any beverage by having it made and served in their own Caribou-branded promotional drinkware. Caribou certainly isn’t the first to come up with such a promotion and they won’t be the last, but as the second-largest specialty coffee and espresso retailer in the United States, this marketing campaign is likely to be successful on a variety of levels. Not only do customers save money on great coffee and get to feel good about proactively participating in an eco-friendly campaign, but they also walk away with a high-quality piece of promotional drinkware they’ll be able to use in the future – even if the promotion expires.