The short answer: Lio has no battery, no liquid and no combustion, so it travels like any small wooden object — and since it releases no vapour and no smell, using it stays entirely your own business. Here is the longer, honest answer, place by place.
On the plane
Security first: there is no battery to flag, no liquid for the 100 ml bag, nothing electronic to take out of your hand luggage. In the tray it is a small wooden object, and that is all it is. In your seat, a slow breath through it puts nothing into the cabin air — no cloud, no scent for your neighbour. One honest caveat: what happens on board is always the crew’s call, and rules are written for devices that emit things. If you are unsure, ask — you will be showing them a piece of wood.
At the office
Indoor rules exist because smoke and vapour reach other people. Lio emits nothing into shared air — the aroma lives inside your own breath — so the three-minute pause no longer requires the walk to the door. On the desk it reads as what it is: a small, hand-finished wooden object.
In a café
Same logic, one addition: the house always makes the house rules. Lio gives no one around you anything to notice — nothing to smell, nothing to see drifting — which is precisely why it is at home in a café. If a place asks about it, the explanation takes one sentence: wood, botanicals, breath. Nothing comes out.
Travel notes
Keep the cores in their sealed sachets until you use them — the seal is what holds the aroma. A refill pack of 9 cores covers about 18 days, which is most trips with room to spare. And as everywhere: Lio is for adults, 18 and over.
The ritual was always portable. Now the object is too.
Lio is a wellness and aromatherapy device. It is not a medical device, a smoking-cessation aid or a therapeutic treatment, and no health claims are made. If you are dealing with nicotine, talk to a healthcare professional. 18+ only.