Infrared Detectors for Running Sushi

  Ever been to a running sushi bar? It's certainly a beautiful way to have dinner, but somehow I feel I can never fully relax: After all, I have to keep track of the food that's circulating, so I know which is fresh from the kitchen and which has already been on tour for half an hour (yuck!). Infrared binoculars could do the trick, but they are not very handy, and worst of all, they will draw too much attention. I would need a lighter and cheaper version that is adapted solely for this specific purpose.