A lot of my art submissions lately may mention my Altoids tin watercolor set. It was my idea to make one to force me to do more watercolor. It's tiny, so it can go anywhere and, most important when I made it, it fits on those little airplane trays that barely fit a book and your drink. I'm having a lot of fun with it and brought it to San Diego Comic Con for the table I was sharing with all the wonderful Womanthology contributors.
For those wondering, I have an image of what it looks like and my whole travel set-up in action: