Ovacik2, Uzum pekmez is the red stuff, i have used that and it makes a nice sherry ish wine fortified with brandy.
Jackstee, no i dont reuse effes bottle tops although you may be able to - before i got a proper capper i used a socket from a socket set and whacked it on with a rubber mallet but i get them sent over by post or by mates coming over. Wilkinsons uk are ok 89p for 50.
But one thing you can reuse is the screw top ones like effes dark and miller bottles - i use those as test bottles for turbo ciders to test the carbonation levels so i dont waste the new tops. Plus it doesnt really matter how much concentrate is in the white grape juice as i want it for making fruity wines with orange, cranberry etc it should actually say on the cartons somewhere, but i do know sultanas can be substituted as well to give wines more body but thy have to be started in a bucket for a few days then filtered into demijohns or fermenters.