Can I combine several essential oils in one session?

A notable feature of this inhaler is that you can introduce different oils one after another during a session, adjusting the aroma profile as you go instead of committing to a single pre-mixed blend. For example, you might start with a drop of eucalyptus, inhale for a minute, then add a drop of lavender to shift the character. This works because the cup holds a small volume (3–35 ml) and the vapour path is short, so each addition changes the output quickly. Do not exceed a total of a few drops per session across all oils combined, and never mix undiluted oils in the cup without the carrier liquid (water or decoction). Clean the cup between sessions to avoid residue buildup that could alter subsequent aromas or irritate sensitive mucosa.