The best-rated reusable K-cup is the EkoBrew Cup, according to Pragmatic Environmentalism. The EkoBrew Cup also gets a high rating from K-cup Barista, and reviewers on Amazon.com rate it four out of five stars.
The EkoBrew Cup receives such high reviews because of its sturdy plastic construction and its user-friendly design. The device also has several holes that direct hot water to the coffee grounds. The bottom of the cup is flat, so users can pour coffee into it without spilling. The EkoBrew Cup makes good coffee with several variations of coffee grinds, letting users experiment. It is also made from 100 percent BPA-free plastic and contains no lead.