I don't understand what you're saying.. i mean, I know that you can remove the bottle on a syphon brush, but you'd still have to clean the nozzle.
I apologize, I know it sounds strange. with my siphon airbrush, I remove the bucket and plug in a bottle of rubbing alcool instead. I block the nozzle of the airbrush and press the trigger so there is a reflux inside the airbrush until paint was still left in the aibrush is removed. Next I spray the bucket with rubbing alcool comming from my alcool bottle until there is no paint in the bucket and conduit. Last I do is shoot a clean cloth until the alcool comming out of the nozzle is clear and then I wash my airbrush metal assembly with the alcool I shot on the cloth.
Hope this helps