We are dailing espresso almost everyday, therefore we know what kind of espresso cup is good.
First it has to be transparent, because we want to see how its crema. Too much crema we know it is too fresh and we might want to rest it longer.
2nd, small but wide enough. Your usual espresso cup maybe too small to swirl, this cup wide enough for your to swirl and try it.
Finally, we kniw its has to be affordable.
 
There you go Home Barista