I currently have a plastic feeder jar type that gets filled up and the top (actually the bottom) gets slid on and all gets flipped over. The food has a space to come under the lip and fill the outer areas where there are holes for the birds heads to go in and eat. I do not like this feeder and the birds don't seem to either. What do you all use to feed? I could go get a heavy crock dog-type bowl that they couldn't turn over. Or, should I build a box with holes and a hinged lid for filling? I'm not sure.