Yeah so you’re essentially holding your breath while you do it, so you’d need to take a break to breathe in and if you’re trying to siphon you would need to seal your lips to prevent losing your progress / prevent the liquid from falling back down. But you can exhale while doing it, which also helps to make sure your don’t accidentally inhale whatever fumes you’re “pumping”.
Granted it’s kind of a silly thing to do and only marginally useful. Each cycle only moves a mouthful of air so I only find it useful for clearing trace amounts of isopropyl fumes from vapes and pipes without hurting my throat, but a fun trick nonetheless if you have the coordination.
Yeah so you’re essentially holding your breath while you do it, so you’d need to take a break to breathe in and if you’re trying to siphon you would need to seal your lips to prevent losing your progress / prevent the liquid from falling back down. But you can exhale while doing it, which also helps to make sure your don’t accidentally inhale whatever fumes you’re “pumping”.
Granted it’s kind of a silly thing to do and only marginally useful. Each cycle only moves a mouthful of air so I only find it useful for clearing trace amounts of isopropyl fumes from vapes and pipes without hurting my throat, but a fun trick nonetheless if you have the coordination.