Class Holly designed and carried out an investigation to find out which drinks were good and bad for our teeth. We used boiled eggs to represent our teeth and submerged the eggs in the drinks for 24 hours. We predicted which drinks would be the best and worst. We concluded that the water was the best drink for our teeth as it did not change the appearance of the egg. We found that blackcurrant juice was the worst for our teeth as it changed the egg the appearance most – the egg turned white and bumpy!