Memories of Buenos Aires 'batido' which is a simpler method without any percolator and uses instant so it's only when you don't have the home for proper coffee!Put your favourite amount of coffee & sugar into the small , add just a few drops of cold water and 'mix the heck out of as you say! Pour hot water just before it boils and from a height if you can and stir. There should be a nice 'crema ' foam espuma whatever you like to call it :)
Yes, it works. I put my mobile on flight overnight too which helps save a bit.