We like this. Almost so luxe it's ludicrous, but then everything sounds better in French...

These are 'boules-puantes', or essentially 'stinkbombs'.

But instead of releasing the evil stench most commonly associated with the idea, luxury candlemakers Cire Trudon have created these to explode with the scent of perfume.

Available in the heady choice of, and decadently named, Nazareth, Odalisque, Roi Soleil, Ernesto, Abd El Kader and Spiritus Sancti, you chuck them on the ground (preferably outside or on a resistant floor) and a sweet scent rises up and fills the surrounding area instantly.

Wierd, brilliant, and the sort of thing Parisiennes should have in ready in their Hermès handbags for when the air in le Métro becomes just too much.