List of places to eat in the center of Koper: PDF
Shuttle service: The easiest way to get to Koper from any of the above airports is to book a shuttle service, for example GoOpti transport. Advance booking is required. You can make the reservation for transfer directly to your hotel. Prices can be particularly good if the shuttle is booked well in advance (1-2 months).Some useful links:
Bus or train: If you don't decide for the shuttle service, you can travel by bus or train. If you fly to Ljubljana Airport, you can get a bus to Ljubljana and from there take a train or bus to Koper.