I have a few 120ml bottles that I just mixed and I'm wondering if I use a small amount of food coloring concentrate, would food this be safe? The food coloring is made by Chefmaster and only takes a TINY bit. Now before you say "why do you need to color it?!", here's why: I've found that when using an rda, clear ejuice is significantly harder to tell how saturated the wick is. Also, it'll be easier to tell them apart from each other. Some of the ingredients include (not all from one color) yellow 5, yellow 6, blue 1, and red 3. Thanks!