We feed them sugar water in a feeder (no dye, just sugar and water). And I am going to try to see if I can get them to drink out of a little red bottle cap in my hand like they did in the video.
It was hard to believe but I have seen a Rose breasted Grosbeak land on the feeder and he looked like he was trying to figure out how he might get some of that nectar. He landed on it twice.