Recently on my international work trip I found myself thinking a lot about how I would bring all my mom stuff (e.g., pumping stuff) with me everywhere and on the plane for a 15 hour flight. I needed something big enough to to fit all my pump stuff, including a large industrial strength milk cooler to keep everything cold, and ideally be able to carry on beside me in addition to a very large backpack I intended to keep in the overhead compartment. It had to be durable and lightweight. Something fashionable would be a bonus, as well as something expandable (in case I needed to bring back more than I brought over), and shrinkable to a reasonable size to double as a daybag if needed.