Many of us have drawers and boxes full of beauty products that we never end up finishing.
We meet the Nordic start-ups who are trying to cut some of that waste by changing the way we shop.
We find out about tech which personalises products, and then makes it 'on demand' rather than in bulk.
And will the use of AI actually end up encouraging people to buy more, rather than less?
Presented and produced by Maddy Savage
(Image: A scientist at Swedish tech start-up Ellure. Credit: BBC)