Thanks for the response. The bowl is marked as microwave safe, but I assume that this means that it only heats to a limited degree as opposed to others.
I was recently trying to dry a rubbermaid bowl in my microwave. I expected it to evaporate the small droplets in short order but I was surprised to find that it only slowly evaporated the water. So why does a 600 watt microwave not evaporate a couple of grams of water in seconds?