There are a lot of threads about sweeteners on ECF, and they are easy to find with a search. Some are confusing though because some give half answers.
I read that some folks use this brand of liquid sucralous... it is available at WalMart. Another is EZSweetz. Both have additives, are not pure like some powders are.
And a warning... "Liquid sucralose can go bad QUICKLY if not properly preserved...even if refrigerated. So, if anyone starts seeing little "floaties" or something that looks like tiny pieces of fibers in the liquid sucralose...TOSS IT!"