Hello Galadrielle! It could work but you won’t get the vibrate colors from gel based food coloring that is more concentrated. You would need to use a lot of liquid food coloring. The colors would also immediately “wash off” quicker once you get a little wet. Hope this helps!

Does liquid food coloring work? Or will it water it down too much

Hi Elizabeth! The recipe makes about 4 cups of sugar scrub. It really depends on the size of your jars and how much you want 1 cup is 8 ounces. You can use larger 12 ounce jars like these: https://amzn.to/4a3SEnp. That would make about 2 1/2 gifts. Hope this helps!