I’ve been trying to think of V-Day themed items and came up with this. I got a few of these boxes to customize. This is what I came up with. There is an opening in the top to put notes in.
Edit: The box measures 6x6 and has a depth of 2.5" in. It is a glass front and is made of wood (or fake wood, not sure). It is very solid. Here is what it looked like before.