High quality materials:Made of durable PP plastic and 304 stainless steel, no rust, BPA free, PVC free, no smell.
Double layers design:The top has two storage for snacks and utensils and one 304 SS soup bowl.The second layer has stainless steel liner with 3 parts.
Note: Without heat preservation function itself.Pls put ice pack or hot water in the PP bottom container to control the temprature.Do not put it into the microwave for heating.