Experts have invented a mannequin with a motorised mouth to test the amount of crumbs biscuits produce.
The dummy has plastic teeth to replicate human eating
Staff at the Mcvitie's laboratory in High Wycombe, Bucks, designed the Crumb Test Dummy to test which baking techniques produce the most crumbs.
The motorised mannequin has plastic teeth and is designed to replicate human eating.
A Mcvities spokeswoman said the crumbs produced by a biscuit show if it has been cooked to perfection.
"Eating lots of biscuits is obviously an enjoyable prospect for most people but we haven't yet found a human who can test on this scale," Mcvitie's brand manager Liz Ashdown added.
"The Crumb Test Dummy has a never-ending appetite and doesn't need to stop for breath."