Not sure if this is the right place to ask, but......does anyone know if the attachable lunchtote and backpack sets from disneyshopping and the Disney Store are interchangeable with each other? My daughter got a backpack from the Disney Store for her birthday. I wanted to get her the matching lunch tote. But she's very petite and when I looked at the ones at DS that matched, I was afraid she might tip over! The attachable lunch totes at disneyshopping look smaller and I just wondered if they might be interchangeable.