FooDoodler Food Coloring Marker is a patented writing instrument filled with FDA approved food dye that can be used like an ordinary marker on hard food surfaces The FooDoodler Food Coloring Markers are available in many cake decorating supplies stores as well as specialty food stores, crafts and gift stores and through catalogs and internet sites The FooDoodler Food Coloring Markers are pareve; the Color and Eat cookies are kosher dairy Our markers have been tested and aproved by leading testing labs as well as major corporations in the food and toy industries such as Kellogg's, General Mills, Hasbro and others We recommend keeping them in the kitchen and away from regular writing markers to avoid confusion