Cafflano Klassic Bean To Cup Manual Portable Coffee Mug 5 "Expensive, but it works" Mr Wells 12 May 2016 A very good travelling coffee maker, but a few tips: 1. The instructions say use 15-20gms coffee beans. 20gms makes a very strong cup. 15gms (or two gently rounded dessertspoons) works better. Grinding the beans takes less than a minute. 2. Set the grinder to a fine grind. The filter copes perfectly well with finely ground coffee. 3. If you like a HOT cup of coffee, warm the cup with boiling water before you start. 4. If you have a kettle at hand, use the 'drip kettle' as a measuring cup to put the right amount of water in the kettle (much easier to pour than with the 'drip kettle')).