Floattie

I don't usually wear a tie, but if I did it would invariably find a way to dip into in all sorts of things.
I also don't work in an office so most of the things would be probably be liquids.

A moisture sensor in the tip of the tie activates a smallish canister of helium to rapidly discharge into a balloon concealed inside the widest fold of the tie.

As the balloon lofts my tie safely out of harms way I can thoroughly enjoy my night out secure in the knowledge that looking like a complete idiot was narrowly avoided.