I like the Stephen Joseph ones from Becky and Iolo because the divider, unlike many, isn’t fixed – meaning you can easily move it to where suits, and it stays in place well. Also, the clips are big enough for little hands to open and the fun design is printed on a clear lid, so you can see what’s inside. Big enough for a sandwich and some chopped fruit or veg, it’s BPA-free and microwave, dishwasher and freezer safe.