Coffee Machines Capsules Capsules of coffee machines are simple to use and don't require a filter or grinder for coffee beans. They are also extremely small and take up less space in kitchens. A capsule is a metal or plastic package that is filled with pre-measured quantities of coffee grounds. https://www-coffeee-uk47875.theblogfairy.com/27969959/a-look-at-the-future-what-is-the-best-pod-coffee-machine-industry-look-like-in-10-years