Here is my Thanksgiving cornucopia centerpiece. I got the actual cornucopia from Amazon, the green sponge insert is from the floral department at the grocery store for $1.00 only, and the flowers are from the grocery store also.
Directions: Cut the sponge to fit, soak the sponge in water rest on top of water and let it sink by itself. Cut the flowers to the correct length. Next time I will cut them shorter. Insert them in the sponge and arrange to your liking. I used an orange kitchen towel to hide the exposed sponge. (Next time I will cut that a little smaller also.)