This happened to me earlier this week. I made some delicious halibut poached in white wine and lemon juice with vegetables, and the delicious sauce spilled all over my bag, despite my attempts to keep the fish container upright. Today, I brought in last night's beef and mushroom soba soup, and that was more successful—Murphy let me get away with it, given that I wrapped the container in a plastic grocery bag before putting it in my tote.

When bringing saucy or soupy foods in, even the better disposable packages tend to leak. Now, this is partly my fault, as I'll just throw whatever package I have in whatever totebag or messenger bag I'm brining to work. (As an aside: anyone want to buy me this laptop bag? My six-year-old messenger bag is pretty worn...)

But I've had a wonderful coffee mug that just didn't spill, no matter how I carried it. I don't care about insulation, really: I just want a bunch of containers like this, in appropriate lunch sizes and shapes.