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A chocolate-mad dad has invented a clever contraption to stop weak-willed dieters dipping into the biscuits and crisps.

David Krippendorf would often ask his wife Jenny to hide junk food in the house so he could try and stick to a healthy diet and resist the temptation to eat it.

But he was unable to ignore his sweet-tooth and always found himself hunting down the sugary snacks and binge eating.

Eventually the father-of-one came up with an innovative idea that would keep his favourite treats locked away until after dinner.

The Kitchen Safe is a plastic container with a lid that locks into place using small prongs for a certain length of time depending on the desired setting.

To curb his cravings David places cookies, chocolates, sweets or crisps into the box and enters a timeframe from one minute to 10 days to lock them away for.

The plastic receptacle will only open when the countdown has ended and the only other way to get into it is to physically smash it.

The Kitchen Safe is currently being listed on Kickstarter, a website where members of the public can donate money to new products and ideas to get them manufactured.

If it reaches the £19,400 target, David expects it to go on sale before September this year for £18.