What is great about the liquid sucralose (ie: Splenda) is that it actually DOES have zero carbs in it.....whereas the powdered in the packets has maltodextrin added which makes each packet half a gram of carb. Apparently, they are allowed to document on the box that the carb count is zero if it's less than 1 Gm. They put the maltodextrin in to make the liquid into a powdered form.
So at half a Gm. per packet, the carbs can add up if you're making/eating significant low-carb sweets/desserts.....there's actually 1 Gm. of carb for every 2 packets....even though the carbs are documented as having 0 carbs.
They do not sell this in stores, I believe....you have to buy it off the internet. There is another brand of it called sweetz-free also, if I remember correctly.