The supplies: 6 silk carnations, 6 2.5 in. Styrofoam balls, cupcake liners, and glitter glue. The Mylar film, ribbon and cylinder box are for the vase.
Cut the ends off the balls so you get sort of a small cookie-shaped piece.
Using a knife, remove a cone-shaped piece from the center of the Styrofoam, around the hole. This will accommodate the bottom of the carnation, making it sit deeper in the cup. (If you're using flowers other than carnations, that have a flatter base, you might be able to skip this part.)
Poke the stem through the hole, top down, out the bottom of the cup. This will mark where you push the stem through the other way so you can reattach the flower.
Put the flower back on the stem, snugging it down into the Styrofoam cookie.
Like sprinkles on a cupcake!