3,Tier Insulated Food Jar, Stainless Steel Thermal Box With Shoulder Strap For Work/Picnic

DOUBLE INSULATION: Double layer vacuum insulation technology for long lasting heat preservation. Pour hot or cold water into the food jar to preheat or pre cool for 1 to 2 minutes before putting food in for better results. 3 TIER DESIGN: Large capacity insulated jar with 3 lunch boxes, you can bring soup or various dishes separately so you can enjoy a richer and more nutritious lunch or dinner.