The coffee machine suitable for university dormitory is: siphon pot, followed by American coffee machine, and then hand-washing pot.

Reason: Siphon pots are generally well-equipped and occupy a small area. Put it in the bag when you're done, regardless of housekeeping. The heat source is also inside, which is the alcohol lamp.

Then there is the gourmet coffee machine, which is relatively expensive and easy to operate. Just plug it in.

You can also make a pot by hand if you have nothing to do. The requirements are low, just boiled water and coffee powder.