[lurquer]

Don’t know why you were downvotes.

This technique has promise.

In short, you construct a shape made of inflatable cells which, when pressurized, contort in such a way that a vacuum is formed in the space within the collection of cells.

The problem, though, is that the additional air needed to make the cells stretch away from the center (and thus make a vacuum) is greater than than the air ‘missing’ from the vacuum part.

In any case, it’s been tried before:

“Vacuum/heat formed cushion with pyramidal, inflatable cells”:

https://www.freepatentsonline.com/5596781.html