Good morning, Heather!
It sounds like you are doing the right thing...never thought of a strainer! Great idea, I'd just be sure it's tall enough so the wings can hang without touching the bottom, which would make them dry "curved". I measured the height of the cup Jim suggested (10 oz clear plastic), and mine was 4 inches and I had the screen all the way to the top. It worked fine, but I wouldn't want it any shorter. Also, be sure the wire "wall" is close to the chrysalis so it will be easy for your baby to get on right away. I still haven't managed to see one hatch out in the chamber and how soon they get up the side, but I feel like I should be there in case it doesn't crawl up to hang. If they don't hang, the wings will be deformed. Try to get it on the strainer or a piece of netting that you can suspend, or even a window screen so it can hang. Although they seem pretty weak when they first emerge, they are trying to grab on with their feet, so find anything you can that it can grip (that's the trouble with slippery plastic or glass containers if they fail to grip the empty chrysalis). When you do any of your "maneuvers", make sure you're working directly above a soft surface in case it should fall. It can be un-nerving at times, but the miracle of watching the whole metamorphosis has me hooked, and I just love to share it! Best of luck to you and your son! Julie