An egg shaped box.
UPDATE: Someone requested the source files so I uploaded them. They are ipt files made using Inventor 2013 Pro. You can get a trial version from the Autodesk University website.
A little last minute for easter but you should still have time to print one for your loved one.
One of the body has the text: Happy easter!
The other one is blank.
Print 1 cover and 1 body.
For me, the cover didn't always fit on the first try depending on which plastic I used. If it does that just sand the inside of the body opening a little bit (doesn't take much).