You may already know the spork, a combination of a spoon and a fork that is very useful for camping or other such situations. The tritensil takes that concept a step further, by addind a knife to the ustensil.
It is actually based on a ustensil that was used by soldiers during World War I to lighten up the package and make the life of army people easier. The revival version was enhanced by Map Studio to be more designy and eco-friendly.
These are now sold by an English department store, Fortnum & Mason, and even have left-handed and right-handed versions.