Red Bull Cheap Syrup Substitute:

I have the one in the silver bottle (top one in the widget below) and it tastes just like the sugar free Red Bull! One bottle makes TWELVE LITERS. That's more than you should probably drink in a month or two. They have some interesting flavors too like one with Cranberry. If you don't have a Sodastream, just add it to carbonated or even regular tap water.