Individuals with Autism tend to like sameness and predictability, and I know that all to well! I very much like my Mountain Dew made by Pepsi, and My Deer Park water by Nestle. I can make do with a few other small substitutes, but I am most comfortable when I have my water and Mountain Dew. I often carry them around in a bag when I go and visit someone, to eat, or go for a long drive. I have not had much of a problem with restaurants and them not liking me brining my own drin