It was a science experiment for my kids in elementary school or middle school. The eggs are the closet to calcium in our teeth. The eggs were emptied of contents. Dr pepper deteriorated the eggs worse than coke, orange juice and a few other liquids over the course of severalbweeks.
Ooohhhhhh.....
I see.
You were dunking egg shells in various liquids to see how fast the liquid broke down the egg shell.
And the Dr Pepper was fastest.
This is probably why Grandma beat me when she caught me giving the chickens a taste of Dr Pepper.