Heard about the Turnip Test? It's the retailers' latest tool to show how packaging can reduce waste, not increase it.

Anyone aggrieved about the use of packaging on fruit and veg is invited by the retailer to "Feel My Turnips". They're given two three-day-old turnips - one is packaging-free and the other is wrapped in clear film - and asked to feel them.

They discover that the unpacked turnip is spongy and unappealing, while the one in film stays firm, say the retailers.

The moral is that a small amount of packaging can prevent a lot of food waste by extending a product's shelf life. Is that a turnip for the books? Or just proof that people know swede FA about packaging?