we have an induction cooktop, and anyone who has one knows you need a certain type to make it work. my question is, does anyone out there know of a particular brand that works on these cooktops? when I surf the web, they never list if they will work. when shopping in person, we bring a little magnet with us and if it sticks to the bottom you know it will work, but over the internet you can't do it. We know all clad and Le Crusset work, but we are looking at less expensive brands for some items, would appreciate help.