If you look at the picture you would be able to identify whats wrong with it. It is a advert by the public service division of Singapore regarding racism. I totally feel that those who created the advert are not being sensitive.
I believe a variety of colours can be used to show that our country is made up of people of different culture and race. By showing four different drinks, The drink which is on our left (kopi-o) is automatically linked with the Indian community. I believe this is a very insensitive act.