I wanted to make a formicarium. It is May 31 now, 5:56 and raining. So after the rain I have a chance to get a queen. I have a test tube but that won't last long. I was wondering what can I use to make a formicarium. I have heard about plaster molding and going bad. I could use plaster but I was wondering if I could avoid mold? Any help is useful. Thanks!