yea i think its fine, all of the places i drank at made there ice from bottled water, dont think theres anything to worry about it, you could always ask if your unsure!
Pretty sure that the Ice Cubes are made from bottled water. To be honest I heard last year that the water is much better out there now and there is not as much need not to drinkt he water. Plus you see Turks drinking it all the time and they seem fine?
having ice in your drinks is fine in icemeler when i am there i always fill my water bottle up from the taps that the turkish use and have never been ill