The AntsCanada Ant Forum's

Making Concentrated Sugar Water. Fill a pot with 1 cup (240 milliliters) of water and 2 cups (400 grams) of white, granulated sugar. If you need to make a smaller or larger amount, then use one part water and two parts sugar.

Mixing different varieties of food coloring along with sugar, water and a waxy base, he set out small droplets of liquid on a white plastic sheet outside in his garden and let the ants do the rest. “As the ant's abdomen is semi-transparent, the ants gain the colors as they sip the liquid,”