Laptop Lunches makes American bento boxes. The insulated carrying case holds various containers, eating utensils, and a bottle for a drink. Everything comes out for washing, and it’s all dishwasher safe.
Amazon has a nice variety of bento boxes, including the “lunch jar,” with the food containers layered into a thermos-like jug. See their bento boxes here.
Korin has a lot of different choices, and good prices, too.
Flickr has a fun bento box group.
Bento Box Website?