Dunkin' on Tap might sound mysterious, but fans of the coffee and donuts chain will know that it's just their name for an increasingly popular variety of drink.

For example, donuts from Dunkin' are sweet, but so are all of the bags, clothing, and accessories from Stoney Clover Lane.

Across the United States, cafes are serving jumbo-size coffee drinks in plastic buckets. The gimmick is working.

These coffee machines from brands like Ninja, Breville, and De'longhi now make quality iced coffee and cold brew — here are our top picks ...