My mom does management at a horse stable, and the office is quite chilly in the winter. She loves soup for lunches, so I got her this:
Amazon.com: Crock-Pot SCCPLC200-BL 20-Ounce Lunch Crock Food Warmer, Blue: Slow Cookers: Kitchen & Dining It's a mini crock-pot that sits on your desk and slowly heats up your soup or chili or whatever in an hour or so. No messing with the microwave, and you can just eat it when you get a chance to sit down here or there. I hope she likes it!