Dunkin' is bringing back its viral 48-ounce Iced Beverage Buckets beginning August 7 at participating locations nationwide. Each Iced Beverage Bucket holds 48 ounces of your favorite cold drink. Customers can fill it with an iced coffee or a Dunkin' Refresher and customize it with flavors and other add-ins, just like a regular beverage. The company has introduced an Iced Beverage Bucket Holder designed to fit inside a standard vehicle cup holder. According to Dunkin', the accessory became available online beginning July 29 for Dunkin' Rewards members with Boosted Status, while supplies last.