An 'edible water bottle' that hopes to replace the millions of plastic bottles thrown away every year has raised over £500,000 in a crowdfunding campaign.

The water ball, named "Ooho!" is a biodegradable and natural membrane which can be fully swallowed and digested, as well as hydrating people in the same way as drinking water.

The product is made from a seaweed extract and is tasteless, although flavours can be added to it.

Skipping Rocks Lab, the company behind it, was founded by three London-based design students, and aims to make a series of sustainable projects of which Ooho! is the first.