The Workflow OptimizerThe 58mm Dosing Cup, perfectly paired with your standard 58mm portafilter, is an invaluable workflow optimizer for your espresso setup. Our Dosing Cups will help you take your beans from bag, to the grinder, to your portafilter -- all without fuss, mess and without losing your precious grounds.As a bonus, you can even use your dosing cup as a shot glass -- either for sipping, or for transferring your espresso into a larger container, such as a travel mug!The 58mm Cup is compatible with most standard 58mm portafilters, including the Breville Dual Boiler, Breville Oracle & Oracle Touch, Flair 58, Rocket, and more.