The colour silver and bokeh really work well together!  The silver seems to bounce off the light making the bokeh even prettier.

In my sample photograph, I painted some walnuts silver and put them in a silver champagne glass.  I used a wide aperture (f 2.8-f4) and created my shallow depth of field by placing my champagne glass and walnuts on a table about 3 feet from my lit Christmas tree. I got really close to my subject when I took my shot to ensure my background would blur.  

Have fun with a silver subject matter and some Christmas lights!