i've never used color flow from a mix; only every used royal icing (of varying consistencies) for the outline and fill-in of flooding decorations on cookies, etc.
i just googled "wilton color flow ingredients" and the fantes.com website lists the ingredients as "dried egg whites, sodium lauryl sulfate", so basically you're paying a whole lot for meringue powder and a foaming agent that you also find in shampoo and facial cleanser, and which many people avoid because of its irritant qualities...read more from the tom's of maine site:What is it?
Sodium Lauryl Sulfate (SLS) is a foaming agent naturally derived from coconut oil. SLS has a long history of safe use in a variety of consumer personal care products.
What does it do?
We use SLS in our toothpaste and shampoo because of its superior foaming and lathering properties. In our toothpaste, SLS enables proper dispersion of the ingredients, as well as easy rinsing. In our shampoo, SLS provides a pleasant lather and thorough rinsing abilities
...hmmm, i wonder what its purpose in color flow is?
p.s. i couldn't find an ingredient list on the wilton site for any of their products...which i find alarming, given the number of food allergies prevalent in children.