I have a Tupperware Modular Mate rectangle 1 to the left side of my sewing machine at all times (it's about 7 X 10 X almost 2 inches deep). In it are the things I use all the time: the most used feet, bobbin donut (pin cushion fits neatly inside it), scissors, wooden skewers, pen and pencil, add-a-quarter ruler, a few safety pins, fray-check, and the spools of thread that I have used from lately. If I need it to go to a class, I usually have to remove several of those spools of thread to get the cover on. Then, when it is sealed, it goes safely to and from class without losing anything.