Are you talking about the small containers that I force the worms to pupate in? I got everything at Walmart. The small containers were in the sports section, fishing/tackle box. They were less than $4 I think. I got the small boxes and they have 24 sections in them. I have 4 boxes pupating at once, so 96 pupae at a time. I don't need to do this too often because the beetles live for several months. I drilled holes in the lids of all the sections, like 6 holes for each section. Maximum air flow with no possible escape. I do have a heating pad but I'm not using it now, it's hot enough in my house right now. I do keep a temp gauge in the room to keep monitoring temps. Unless you keep your house really cold, mine is set at 80 degrees and it's hot in here. That pic was in february and it was cold here.