Periwinkle Crystal Colors Certified Food Color. 1/2 oz. easy open container. Colors are used for gumpaste flowers, buttercream, royal icing, fondant, white chocolate and other applications. There is no bitter taste. The colors are very intense so a little goes a long way. Mix color with vodka or lemon extract or dust directly on icings or fondants. Dust directly on flowers with color. Made in USA.