One type of tomato cage (like the one Allison is showing) I stick into a container with a Hummingbird plant inside so that the Hummers have a place to rest on. A couple of years ago I found a red tom. cage!
For the other type of tom. cage (boxy looking), I tied two of them together to make it taller, stuck it into a larger container with a Hummingbird plant inside and had Hummers using it all Summer for a tall 'look out' perch! They loved it!
I'll have to round up some pics for you (w/o Hummer).