This supermarket is a life saver! Make sure to get your food and drink needs satisfied before you go to your gate where everthing is of course twice or three times as expensive.
By the way: They have all the czech stuff you might want to export: Beer in cans, the waffles etc...
If you have got any time left before you have to hurry to your gate. Pay this suprmarket a visit, get some water or Kofola, get some chocolate and enjoy the weirdly empty airport or watch something in this strange cinema-thingy in the departure hall in Terminal 2. Oh and apparently there are also games you could play...: http://www.prg.aero/en/news/news/traditional-czech-games-at-the-airport-now-include-hopscotch/
Get some snacks and enjoy1 read more