Margaret has blogged about an egg cup that her husband Miles has used since he was a child for her weird object Friday post.   Her brother Ben has blogged a picture of his egg cup also.   I too own an egg cup that used to belong to my mother.   According to a link that Margaret found, it is used for soft boiled eggs.   Below is some information I found on Ebay that is about my particular egg cup.   I also found a picture.

" This egg cup is vintage Opalex made in France, and consists of a little white chick carrying the egg cup on its back.   It measures 2 ¼” high, 1 ¾” across the cup opening, and about 3” wide at the widest part. "

I also learned that this little chick is made of  milk glass.