what is the difference between keurig k duo and k duo essentials?
K-Duo Essentials only have 3 sizes for K-cup and carafe. However, K-Duo has 4 brew sizes for K-cup and carafe. It can make smaller cup size of 6 ounces for single serve side and a smaller 6 cup carafe size. The extra smaller size gives you more flexibility to avoid coffee wastage if you require lesser coffee.