These mini stainless steel tiffin lunch boxes with two or three compartments have been used for years and years in Asia to transport various types of food to school or to work.
Each compartment can be re-heated separately or used as a bowl. It works really well for carrying cut vegetables, nachos, nuts, as long as the contents are not too liquidy (best to keep them upright if carrying a liquid). The compartments are not watertight.
Materials: 18-10 (304) food grade stainless steel. BPA-free, phthalate-free, PVC-free and lead-free.
2-tier Dimensions: 5.5"L x 5.5"W x 8"H
Compartment Diameter: 5.5"
Compartment Height: 2.6"
3-tier Dimensions: Length: 10 cm / 4"L x 4"W x 8.5"H
Compartment Diameter: 4"
Compartment Height: 2"