[JenB]

Or, put it in the container the night before and freeze it. Then leave it out, or in a fridge, at work, and any remaining ice will melt in the microwave when you heat it up.

[RosieCotton]

It takes a LONG time to melt frozen soup. Voice of experience here.

The Thermos idea is a good one, though! Next time I'm over at Wal-Mart I'll have to check those out.

Someone needs to invent plastic food containers with a screw-on lid. Why is that so hard?