There are also two sets with round or square boxes. But for my taste are the rectangular the best. In particular, because they have almost two grids for the closure side they close in my opinion better and keep you properly. Are in convenient sizes and can pass through the rectangular shape also something with a larger footprint inside. They should never be underestimated, however. In the gößte a Lieter goes inside. I've since initially often misjudged and taken a too large can. And most importantly, they make "addicted". We have 4 mitlerweile such setting in use, the fifth I've just ordered. Whether leftovers from lunch, sandwiches for the trip, candy or coffee beans. As soon as a new set in the house, it is already in use. But one another stackable cans would also, if they have kept time nothing ;-)