The airport has no decent restaurant just a small selection of pizza, burger, Tex-Mex and sandwich bar type places. You'd be better off bringing in your own food and water than paying the exorbitant prices for the poor quality food on offer. Air-side of security, there is no free supply of reliably clean drinkable water. If you ask the airport employee (one of the people in a bright green jacket there to help visitors) you might be pointed to the toilet handbasins.

The duty free is limited and filled with predominantly very expensive 'international' brands rather than local produce.