In science we did an investigation to find out which liquid does the least damage to an egg's shell. We had five hard-boiled eggs, each in a different liquid, and we were going to look at them and see which of the eggs has the most and the least damage after a number of days. The liquids we tested were: milk, cola, orange juice, vinegar and water. We looked to see if the shell was damaged, soft or hard, if the colour had changed, or if it still made a noise when tapped.