This is a pack of edible food coloring pens for cake and cookie decoration. 
The set includes five pens in red, yellow, green, blue, and brown colors. 
The ink is food-safe and designed for use on fondant, icing, and other edible surfaces. 
They are a popular tool for DIY baking projects and adding decorative flair. 
The markers feature a quick-dry, no-smudge formula.