OK it has been a while but I used to travel with this:

https://www.handpresso.com/en/22-manual-range

(handpump air pressure, boil water exteranlly). Some lessons, don't play around with ground coffee use Nespreso or ESE pods. I would also first pre-heat the unit, pour out and put the boiling water (PS not pre-heating coffee cup is a pet peeve for the small thermal load of expresso)

And now I see they have it all battery charged so you don't need to boil water or hand pressurize.

https://www.handpresso.com/en/handpr...resso-389.html

Espresso is now more prevalent and energy drinks mean I can live without this in my current travel arrangments