The cake is made of rice flour, sago, coconut milk, sugar, salt, and food colouring. A version including pandan prepared with green food colouring is also popular. Pure silver metal is used as a food colouring. Mix the batter with "suji" or daun pandan paste as green food colouring. One of its uses is as a food colouring. Cochineal is used as a fabric and cosmetics dye and as a natural food colouring. Some of the main ingredients are salt, sugar, food colouring and plums. Cochineal is used primarily as a red food colouring and for cosmetics. Modern squashes may also contain food colouring and additional flavouring. It sometimes contains green food colouring to further enhance its colouration. The contents are usually salt, artificial butter flavoring, and yellow food colouring. Food colouring is added to change the colour of any food substance. Circa early 2011, Altoids altered the ingredients of their Wintergreen mints, adding blue food colouring. C-phycocyanin (C-PC) can be used as a natural blue food colouring. Popular food colouring includes green-coloured pandan and red rozen food colouring.