I made this project a little more simple and homemade. My girlfriend (wife now btw) lived 1,500 miles away and I wanted to do something special for her for Christmas that brought us closer. I had seen a concept for Portal engagement rings but I couldn’t find anything I could actually buy. The box, I’m sure you can tell, is made out of cardboard. The rings took me a while to hunt down and get the right Portal colors. Finally, I found Tungsten Rings Mall, where you can find any ring with almost any color or design ever.