Egg standing without the outer shell

Well a boiled egg can stand without the outer shell but how about a raw one. Biswarup Ganguly an Indian Photographer did just that to take a picture of this egg standing without its shell.
He says he has done that by removing the eggshell by dipping a normal chicken egg into vinegar for 48 hours. Hmmm….. even you can do this at home if you can wait for 2 days to see this in action.