Inflatable Metal

At first glance you might think these are your typical inflatable beach like toys, a whimsical idea that isn’t functionally feasible.
Well think again, using a similar process but swapping materials Architects Oscar Zieta and materials scientist Philipp Dohmen have developed a process that takes two thin sheets of metal and welds them together along their seams, and then inflates them through a hole with high pressure using water or air.
With this technique, the metal finds its optimum shape and therefore becomes incredibly strong.  When put to the test, their ‘Plopp’ stool was  able to hold 2.5 tons!