I'm learning on the go but need an instrument

[yd07d4w8u6]

When I worked at home a lot I would just buy some cheap upright piano and train/learn how to play, but now I'm on the go a lot an would need something really portable. I can study music theory but without practice it all goes down the drain.
I know it's is a joke but is there and flexible roll up piano that it's not a joke actually ?
I tried to use my Arturia Keystep but I'm not a fan of these narrow keys, considering that in general even on regular size piano I have hard time to hit right key and sometimes just accidentally hit the other one as well.
What would be your advice to learn while travelling?

[Vurniks]

What about the carry-on folding piano? https://www.amazon.com/Carry-Folding-Pi ... B08WY6J7XQ