Flavor Delivery

A classic problem, can flavor be delivered with digital stimulation?   Research has been going on for a long time.    Getting to the Bottom of a Digital Lollipop - NYT Bits   " ... While it might sound complicated, the technology is relatively simple. When the lollipop, which is made of a silver electrode, touches the tip of the tongue it reproduces four well-known tastes: salty, sweet, sour or bitter. Together these flavors can create different simulations close to the real thing. ... "