They're really easy to make, too. I did one just using a cap, a plastic champagne cork, and a hot glue gun. I was in a hurry and didn't want to wait for stuff to dry! Actually, I haven't seen anything other than hummingbirds around my feeders either. And I am a HUGE fan of rubbing alcohol. Did you know that if you put it in a spray bottle, it will kill wasps and yellow jackets just as well as that nasty wasp and hornet spray? No lingering odor and no nasty residue. Of course, I only use it if I have one indoors in a window. Soak that puppy down with alcohol and they drop like a rock.
