When one has a cold common disposable tissues are the state of the art solution for getting mucus out of one's nose.
If there's however a lot of mucus a bit of that mucus usually ends up on the hand that holds the tissue.
This in turn makes it likely that germs end up on the hand and on objects that one touches with the hand.
If we invent a better solution to replace disposable tissues, it would be valuable for reducing the spread of infectious disease.
Does anybody have ideas?