It is in my mind too.
I planted 2 plants this year in different locations. I added the tall (double) stacking tomato cage one year and the hummers loved to sit and rest a lot and leave it up. The third tomato cage I used on the patio with the other coral porterweed and they've used it also, even if it is shorter. But they really loved the taller (double) stacking cage to look around and spy on other hummers. The taller cage I've on the end of our side entry driveway with a lot of containers.