I have never used anything but pyrex what ever you do not use anything that is not marked for microwave use whatever you do do not use coffee cups or any other potentials that would not be I tempered for temperatures in your microwave we have been burned many times by hot plastic but definitely do not want anything exploding in my face we do where I protection at all times make sure that you were wearing goaves I usually only wear one of that time handling the injector with but to be on the safe side I use both hands protected also I would be wearing longsleeved shirts also do not wear shorts I should practice what I preach I have burn my legs many times with plastic and whatever you do using hot plastic tape every caution possible protect yourself.