I've been reading that glassware like the new Pyrex and Anchor are not to safe to use in microwave. Are there other better things to use to cook plastisol or will I be ok with my Anchor measuring cup?

I use Pyrex and set them in a electric skillet to keep them hot. I found I couldn't do a lot of baits with the microwave because it would cool too quickly. Or I'd over heat it...or I got bubbles. This way I can just crank em out without having to fuss with inconsistent temps.

I have been using both brands of cups for a few years now without any problems. Make sure to clean and inspect them for cracks or chips often and wear your safety gear. 

Yep- been using both with no mishaps yet. But I wear gloves and have a bucket of water by my side all the time because I do get burned from time to time. And I always wear an organic vapor mask and have exhaust fans going.

 

I had problems with the glass so I switched to a cheap microwave and Nor Por cups.   I use them all the time now and my Pyrex stay in the closet.