I'm not sure exactly what the experiment is (I don't think it's all that relevant, but I might be wrong), but apparently, a reaction happens in a test tube that heats it up so quickly, it shatters. Is there a way around this? I don't think heating it beforehand helped. I read somewhere that sterilizing the tube under pressure would prevent shattering, but would that work if the tube breaks because of heat, rather than pressure?