Dunkin' Offers Free Bat Koozies for Halloween Drink Promotion

• Dunkin' is giving out free bat Koozies for one day only.
• The promotion is tied to a new Halloween-themed drink.
• The offer is available at participating Dunkin' locations.
• The promotion is a one-day event celebrating the Halloween season.
• Details on how to get the free Koozies are provided by multiple sources.