Here’s an interesting way to use a recycled pen. Start by removing the guts from a dried-up pen. Firmly place the cap back on the pen. Fill the pen with water and slip a flower into your new pen vase. Since the cap prevents the vase from standing upright you can place the vase in your pencil cup, your toothbrush cup, or any other object that will hold it upright. Or you could use a blob of clay to hold the pen upright.
If you don’t have a fresh bloom, skip the water and pop in a silk flower.