This is such a neat idea. As described on the bottom of the mug; "choose the colour swatch that's perfect for youmix tea, hot water, milk and sugarto match"Inside the mug are 4 color swatches labeled:1. Milky tea2. Classic British tea3. Builders Brew tea4. Just Tea teaCondition note: there is a tiny black dot on the rear upper surface. Please see the 1st photo where a red arrow is poiinting to this tiny dot.