Bulky mobile phone chargers could soon be a thing of the past with handsets running on soft drinks instead.

Daizi Zheng designed the 'greenphone', which is powered by Coca-Cola, as part of her final university project. The Central Saint Martins graduate came up with the concept for Finnish mobile phone manufacturer Nokia.

Ms Zheng said the prototype could run up to four times longer than a traditional lithium ion battery and has the potential to be fully biodegradable. The greenphone's bio battery generates electricity using enzymes to catalyse sugar in the drink.

As the battery dies out, only water and oxygen are left behind. Unfortunately, Nokia will not be developing the greenphone prototype further in the near future.

Ms Zheng said: "At the time they wanted something to bring out within the next two years and thought my design was too futuristic." But she added that bio batteries are being developed by large electronics companies and may be on the market in the next five years.

I can see it now... the Samsung Tango... the Appletiser iPhone...

It wasn't advised to run whilst carrying the pop powered phones...

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