Cookie Sprinkles in Test Tubes

I am halfway to a really good idea.  I have put my prettiest cookie decorations in test tubes!  I knew that it would look really neat - along the lines of spices that are sold in test tubes, but prettier.  The only problem is I need a rack or some sort of container to stand them up on.  I want to have them out on my kitchen counter as "art". 

I bought two sets of the Martha Stewart Test Tube favor kit with cookie sprinkles in mind (I think it was designed to be a Halloween party favor full of candy), and naturally I couldn't wait to fill them with a lovely array of sprinkles.  But I need a rack!  

For now they are leaning inside a large bowl and the effect is just not the same!  Anyone have any ideas?