Chocolate that melts in your hand could be consigned to history if Kraft Foods’ new ruse is a success.

The Cadbury owner is hunting for high-tech film packaging that would keep chocolate solid at temperatures of up to 40 degrees Centigrade.

A tender document has been published on Kraft’s behalf by US consultancy NineSigma invited packaging companies to submit plans within the next nine months.

“Kraft seeks novel materials or approaches to packaging that can protect single-serve chocolate bars from medium-term exposure to warm ambient conditions.

“These products frequently experience multiple cycles of exposure to controlled and uncontrolled climates. Product may be shipped in controlled and uncontrolled conditions, sold by the retailer in an air-conditioned setting and consumed sometime later after having been carried on the person or in a handbag.”

The document notes that existing temperature-resistant technology is “both cost-prohibitive and excessively bulky”.

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