storage cup slide frame domed hanging

I'm not exactly sure what to call this thing so storage cup slide frame it is.  The idea is that the frame can be hung from something and a used yogurt cup having a flange can be slid into the frame for storage of things. Specifically the yogurt I have in mind is Activia which has a container with a large, flat, and square flange around the top edge.  The flange is approximately 2.5 by 2.5 inches, although the flanges on some cups may need a tiny sliver cut from one or two sides using a good pair of scissors to get them to easily slide into the frame.

This version of the frame attached under the dome has two small friction tabs on the top rails that are intended to pinch the cup flange slightly to prevent the cup from sliding out too easily.  If you don't need the friction tabs you can simply cut them off with a small pair of wire snips or cutters.

My primary motivation for designing this frame is to eventually use it in various outdoor applications for things like small bird feeders, pest insect glue traps, and a host of other uses that would benefit from a container that is easily removeable.  Two small holes are also located in the frame that allow for a small screw to pass through the cup flange and hold it firmly in place, for example if the unit is swinging on the branch of a tree.