Bumpy labels
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Bump Mark reveals if unopened food has spoiled

Solveiga Pakstaite, an industrial design and technology student from Brunel University London, has created a way to tell if food has gone off without opening its packaging.

She calls her design the "bump mark".

It is is a bio-reactive food expiry label which shows you when your food is going off in a tactile way, by becoming bumpy.

The label sits on the package and decays in the same process the food would.

BBC Click's Spencer Kelly spoke to her about the idea.

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