We did a Science Project for the science fair
How do different liquids (drinks) affect your teeth?
Different liquids will do different things to eggshells like water does nothing to the eggshell and tea cracked the egg also stained the eggshell.
we used Chicken eggs, 5 glass jars and bottles of:
* water (bottled)
* iced tea
* 100% Orange juice
we Let the eggshells sit for 10+ days and the orange juice has mold the eggshell, also it got disintegrated almost the the whole eggshell.