In other words, plastic and stainless steel each have their strengths. On the one hand, plastic boxes are often cheaper, lighter weight, and come in a variety of sizes.

Milton Pro Lunch Tiffin (3 Microwave Safe Inner Steel Containers, 180/320/450 ml; 1 Plastic Chutney Dabba,100 ml; 1 Aqua Steel Bottle, 750 ml, Steel Spoon and Fork) With Insulated Fabric Jacket, Black ...

LunchBots design and use The stainless steel boxes are dishwasher safe. LunchBots My Small Protein Packer Box is 5.5 inches by 4 inches by 1.5 inches, and it has four compartments inside.