Turn any cup into a fly catching cup! Just add something sweet to a cup, pop the fly lid on top, and you are ready to catch some flies! No need to use poisons or messy sticky traps to rid your house of flies. With the Fly Lid, you can use safe and natural ingredients from your own home. You can repurpose a used disposable cup or you can use a cup from your cabinet. The patented tiered design allows the Fly-Lid to fit on most cup!