It is a stainless bird feeder. It has a screw that pokes through the screen and a peice on the other side to hold it in place. Heres a pic of what the bowl sits in. It works very well, i donthave to worry about it falling. Asaigo is waiting for her noms.
that's a pretty genius thing you got there i've been looking at possibly doing some bowl feeding for my cham who currently does free range feeding right now.