Pro tip for sucking volatile gases, you can suck air into your mouth and push it out your nose without it going into your lungs. I do that when I clean glass pieces with iso when there's still some vapors present. If you exhale out your nose while you do this you can be extra sure none goes into your lungs. Granted you should also be sure you're actually pulling liquid if you're trying to syphon, but at least you wouldn't be pulling into your lungs.