yeah but eventually we will have actual cannabis grown on Mars, and Lunar Kush, people will import it back to Earth and sel it for alot just to say u smoked weed grown on the moon or mars... there will definitly be vape pens on board Elon Musks spaceships espcially because the space port is in newmexico where they have legal cannabis so ya and i mean u could also just smuggle vape oil in with ecigarettes , people will be vaping in space for sure