Anyone who would buy this already has too much air in their head.
A man is selling Welsh air to expatriates who miss the valleys.
John Gronow from Lakeside, Cardiff, has collected air from Snowdonia and the Brecon Beacons and will sell it on his website walesinabottle.com
Each bottle comes with a certificate guaranteeing the air has been gathered in the Welsh mountains.
He said: "I am offering a genuine service for people who want something of Wales that reminds them of their childhood or their homeland. It is the genuine article from the green, green grass of home.
"There are more Welsh exiles out there around the world than there are in Wales who long for something from the land of their fathers."
The bottles of air will sell for £24 reports BBC online.