The Rolltop Expandable Lunch Bag's unique design unfolds to accommodate a variety of food containers, then folds down and converts into handle with buckle closure. But it doesn't just insulate food on the go—it can also double as a chic purse when you're done with lunch. The Rolltop Expandable Lunch Bag is easy to carry on your arm and it also attaches to bags, backpacks, and strollers.