I once used kind of a big long pen for identification of bacterias. You pulled out the needle out of the pen then after doing your swapping put it back into the pen. The pen was designed of multiple different chamber each with a different media. There where 12 different media in it and after incubation of 24h you could identify which bacteria you have. It was easy to use. I want to use it for a course but it is 20 years ago that I used it the last and only time.
Does anybody know the name of it.