Yes, it's a ring box. And no, there wasn't anything in it. He thinks it's funny to tease me like this, but I say it's just mean!*
*I should explain this a little more: In Vegas last month, he got very drunk and we got in a bit of a tiff over some of his antics. During his efforts to make up with me, he let it slip that he is planning to propose in the next month. So this is his way of messing with me to try to throw me off, because he wanted it to be a surprise. If I didn't know his intentions, it would certainly be a slap in the face.