Keurig's K-Rounds Are Compostable Coffee Pods, but They Only Work With Its New Alta Coffee MachineThe new K-Round coffee pods are made out of coffee and seaweed, but they'll only work on Keurig's new Alta coffee maker.
Source: Keurig's K-Rounds Are Compostable Coffee Pods, but They Only Work With Its New Alta Coffee Machine (https://www.wired.com/story/keurig-k-rounds-coffee-pods-keurig-alta-coffee-maker/)