Never. Vossa diffusers are fully waterless — they atomize pure essential oil directly, so you get the true fragrance with no dilution, no dampness, and nothing to spill in the cabin.

Depending on the model and intensity, a single fill runs from several days to a few weeks. The larger-reservoir models (Pure 30, Vent 30) go the longest between top-ups.

Complimentary over $70; under that it's a flat $8. Vossa ships direct from our manufacturing partners, so allow 2 to 4 weeks from order to delivery — 1–3 business days to dispatch, then 10–20 business days in transit, tracked end to end. Most orders land inside two to three weeks. Full detail in our Shipping Policy.

Three, and they stack with nothing else — use whichever saves you most. VOSSA10 takes 10% off any first order when you join the list. VOSSA15 takes 15% off orders over $70, which is also where shipping becomes free. VOSSA20 takes 20% off orders over $90 — the cheapest way to buy a second diffuser for the house.

You have 30 days from delivery. On orders under $50 we refund you in full and you keep the diffuser — no label, no postage, nothing to send back. On orders of $50 or more we'll ask for the item back at your cost. Every Vossa also carries a 90-day warranty against manufacturing defects.

Yes. Vent-clip models attach to standard dashboard vents; cup-holder and console models sit anywhere flat. If you're unsure which suits your setup, the Smart and Pro are the most universal.