Inflatable soap is widely known to exist in the form of soap bubbles, but these are kind of single use and are not very practical for cleaning hands or body parts in the bathroom.
This idea proposes how a soap is formulated that it can be inflated for use.
Proposed is a formulation of thick (viscous)
liquid soap, being soap with added liquefier type substances as typically used in dispensers.
This is too runny to inflate, and so it needs to be made more solid. We can't do this by removing the liquifiers since then it becomes hard, and is too stiff to inflate.
There are two possible directiosn to take. One is to replace some of the water-based liquifiers with gum or rubber based liquifiers, such that the soap remains liquid but is stretchy and has elcastic strength (in tension). Similar to bubble gum.
Second is to make some kind of micro-fiber lattice substrate which the viscous liquid soap naturally clings to and fills.
Perhaps the ultimate solution is to combine these technologies.
The advantage of this would be