OUI’s stainless-steel lunch box duo is the perfect choice for storing and serving on-the-go meals. The stainless-steel bowls nest inside slightly larger plastic containers that you can fill with hot water to keep your food warm. The leak-proof lids offer a stay-fresh vacuum seal. Just as good, this duo is sized to fit into our lunch totes so you can design your perfect solution for healthy meals on the go (and save money, too). BPA-free. OUI is a new brand of thoughtfully designed living solutions that make room for your best, most joyful life. OUI creates unique products that brim with purpose and positivity. Make room for your story with OUI. Exclusive to our site. Capacity: 54-oz./1.6L without lid, 47-oz./1.4L with lid. 6” x 5.6” x 6.7” tall. 304 stainless-steel interior, plastic outer, polypropylene lid with silicone seal and ABS plastic lock. Do not microwave. Hand wash.