The containers I used above I bought at the $1 store, they hold 15 each, doesn't get much cheaper then that
I had them in plastice cups, deep ones but with no lids and was paranoid somehow they'd get knocked over. So far as I know the beetles lay their eggs on the bottom of egg cartons, when the worms hatch they are too small to see and drop into the substrate, then take weeks to grow. I plan on leaving the beetles in there for a few weeks, maybe 3, to make sure they lay lots of eggs, then move the beetles to a fresh container. I bought stackable containers with sliding drawers and will use one drawer for each stage I guess.
This site was also helpful:
http://www.geckotime.com/how-to-breed-superworms/
It says a beetle can live for up to 5 months, glad they said that or else I would of just started the process over again right away, I assumed they'd live for a month or so, and considering it takes that long to even get a beetle I was afraid they'd die off before I had more to replace them. I could of been over run!! LOL Once mine turn to beetles I will prolly wait 2-3 months and start again. My goal is to have 500-600 superworms per month that are the right size for feeding.
I'm starting a mealworm colony too, read up on those, they are even easier, you don't need to separate them or anything apparently. My beardies don't care for them too much, but I will give them to them from time to time for variety and I also have geckos. I'm going to start with 50 mealworms max I think, I don't imagine they'll all pupate, and I only want a few hundred per month that are a suitable size for feeders.
Hopefully within a few months I'll only have to buy crickets