I used silver glitter paper and wrapped the outside of a glass square vase. I realized the corners aren't covered, but, hay, I just pretend to be a party planner :) I then took sequin trim found in the ribbon section at Hobby Lobby and wrapped the top of the paper. I then adhered the prom people onto the paper. It was more difficult to get them to stick to the glitter paper than I thought it would be. Tape and scrapbook squares did not work. I ended up using school glue.
So now I have my dilemma of what to fill the containers with. Of course blush pink roses would probably look really nice, or Grace's favorite flower, tulips. But I'm still trying to think outside the box. I've been wanting to try to make a feather pomander for a while. I put one together tonight using a feather boa from the Valentine section at Hobby Lobby (30% off this week) and a foam ball. I stuck it on top of the vase. I've ordered those LED lights that can be put in water and I'm thinking one of those in the container to make the inside light up may look nice, but here is what I have for now. I'm not sure if I like it... It may turn out to hold flowers on "prom day."
If I decide not to use the feather pomanders in the vases, I think they'd look great as a centerpiece on some of the tables on top of my silver IKEA candlesticks.
Again, thank you everyone for your suggestions! What fun ideas everyone had!