We use two different reusable sets because of lunchbox sizes. One is the Russbe Lunch Bento. It has three compartments and a lid that seals very nicely. That one fits in my daughters Pottery Barn Kids lunch bag. The other set is a Rubbermaid Bento Box. It has three separate containers, two go into a larger container and there is a separate one as well. They snap into an ice block, which is nice. We have had them for at least three years and they are both still going strong.