Portable 3D printers are becoming a thing or so it seems. We have already covered a bunch of them here in the past. The Focus printer is quite special though. It is not only ultra-portable, but it also features exchangeable extruders. That means you will be able to print with all kinds of filaments.
The ByFlow Focus is foldable and lightweight. It uses magnets to let you switch your extruder. You an print with PLA , ABS, wood, nylon, silicon, and other materials. It is easy to use and does not need any calibration for you to get started. It has an aluminum and stainless steel construction and offers USB and SD card support. You can find out more about it on Kickstarter.