The Portabee is minimalist in both parts and size, so it’s easy to assemble and it’s portable.

Portabee specs:

Filament size: 3mm
Filament type: ABS, PLA
Machine size: exact size unknown, but small enough to fit in a laptop bag
Build volume: 120mm x 120mm x 120mm
Max print speed: N/A
XY precision: N/A
Minimum layer thickness: N/A
Software: open source chain
Other features: collapsible for transport, sD card slot
Price: $499 ($699 assembled)

Website: Portabee