*Others K-cup coffee grounds are not completely fresh because freshly roasted coffee releases CO2 (carbon dioxide) for at least 2 weeks post-roasting. And they seal their K-cups in a standard airtight way which would cause the capsules to actually blow up if the coffee were fresh! Happy Mug Roasters solved this problem with their unique one way valved, double filtered, iFill K-cup®. This way we can grind and fill your K-cups the same day they were roasted and send them Fresh to your door!