A group of London-based industrial designers have created an edible water bottle using algae and a technique popularised by El Bulli chef Ferran Adria.
The edible balloon is made using a technique called spherification, a method of shaping liquids into spheres first developed by scientists in 1946, which captured the public imagination when used in recipes at Adria's restaurant in Spain.
To create The Ooho, water is frozen and then placed into a solution containing calcium chloride and brown algae. When the frozen water is introduced, the calcium solution causes the outer layer of water to form a thin, flexible skin.
The result is a package that is, "simple, resistant, hygienic, biodegradable and even edible," the designers said in a statement.
To drink from the Ooho, a user simply applies light pressure to the sphere causing the water inside to burst through.
The technique can also be used to incorporate edible labels, sandwiched in between two gel layers.
The designers believe that the technique could be used to replace traditional plastic water bottles entirely, with each Ooho costing around a penny to make.