A clip, a vent, and a three-week habit.

Aer Clip slides onto a car's AC vent and keeps the cabin fresh for about three weeks. At ₹200, it's cheap, easy, everywhere — grabbed at a kirana on the way back from the petrol pump, without thinking. The whole business runs on one quiet assumption: when it fades, they come back for another.

Aer Clip is the category leader, Aer's single largest SKU — and one that has seen the chart only go one way from the start: up.