Now days there seems to be a lot more interest in making artificial baits, particularly in pouring plastic . Here is a safety tip to consider.
For those new at pouring plastic and use the microwave method, if you continuously reheat and remelt plastic over a long pouring session the Pyrex glass cups do not stand up well to continuous and long periods of high heat. They can shatter. I speak from experience. Better to spend a little extra and invest in measuring cups made from borosilicate glass. They tolerate much higher heat over long periods of time and do not shatter like Pyrex can.