First off, let me say hello... I've tried using the search feature on this site, tried searching for videos on youtube, and other forums as well for my question. So here is the question, Can you use pyrex cups with a hot plate to keep plastic warm? I know in the "dont's for newbies" sticky, someone posted that its a don't. I've seen videos on youtube where a guy was using a hot plate and had his pyrex cups sitting in it. I just don't wanna go buy a hot plate and something go wrong and get burned... I use a microwave has of right now but I have a bad problem with little bubbles when I go to reheat the plastic.... Oh how I hate those bubbles.