The Milkshakes are made with the bath bomb mix,the Bath bomb mix is baking soda, citric acid(optional) cornstarch, kaolin clay (food coloring ) for color can be in color or plain as if it were a vanilla shake, the Bath bomb mix is baking soda, citric acid(optional) cornstarch, kaolin clay (food coloring ) for color with Whip Cream on time for fun. This is a multi-use fun