If I'm completely honest, after about a week of them doin' their business in that container, I couldn't stand to look at them...it just looked unsanitary to me...silk and poop and they just kept eating around it all. I kinda think just finding a caterpillar outside and giving it natural stuff to eat, like leaves and what not, would be a better idea (for me) next time.
Anyway, after about 8 days, they crawled to the top of the container and hung themselves upside down...this part of the process was so AMAZING. Something that we observed was that all the caterpillars heads fell off!!! That's right, they lost their heads. When the first head fell, we all freaked out a little...thought we'd lost one of our pets halfway through the process...but then the other four caterpillars lost their heads too! K. Guess that's just how they roll.
And after about 8 more days, they emerged from their cocoons with their heads at THE OTHER END! What the??? We kept them in our little butterfly habitat for a couple days, feeding them watermelon, oranges and sugar water, and then decided to release them.