Portable 304 Stainless Steel Lunch Box

Material:
The inner layer is made of 304 stainless steel, known for its durability, safety, and ease of cleaning. The outer layer is typically made of PP plastic to prevent heat transfer to the hands. 
Layers:
The 3-layer design allows for separation of different food items, preventing flavors from mixing. 
Insulation:
The lunch box is designed with insulation to help maintain food temperature, and it's often recommended to use a separate insulated bag for optimal heat retention. 
Design:
It features a compact design with a carrying handle and a silicone seal on the lid to prevent leaks. 
Portability:
The lunch box is designed for easy carrying, making it suitable for work, school, or outdoor activities. 
Cleaning:
The stainless-steel core is removable for easy cleaning, and some versions may be microwave-safe with the addition of water at the bottom of the tray.