Photography of glass products. What pigments are used for the different colored liquids in the glass?

They are available in cake shops, with food coloring and the like, in various colors

If it is used for photography, any color will do, just color pen paints, red and blue ink, Vinegar, etc.~

In addition, if you want to take photos of light-sensitive drinks, you must add a certain amount of water to the drink to increase the light transmittance, otherwise it will not be fresh and attractive, such as beer~