If your phone or tablet battery is dead or low, restaurants, pubs, and other public spaces are a good places to charge your devices.

That was the thinking behind ChefCharger, co-founded by Lana Ibragimova, who first noticed a persistent trend among customers at the restaurants she managed - they often requested tables near a power outlet to charge their phone.

The problem led to the development of Circle, which lets you plug your nearly dead phone into a bamboo waterproof drinks coaster, enabling it to be charged and used while you enjoy a drink.

A prototype has been trialled in a few restaurants, but the team behind Circle is now looking to crowdsource funding for a full rollout.

In addition to the engraved designs which will be available at launch, Kickstarter backers have access to limited edition Circle sets featuring artwork by Jon Burgerman.

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