Vollrath #VDBBM300 - Food Delivery Backpack Bag - 3-Series, 16"W x 16"H x 13"D. 

Features:

-Optional heat pad with power cord to pre-heat bag to better maintain food quality and extend delivery range
-Super durable, high-quality moisture-resistant outer shell material shelters food elements and help maintain temperature
-High-performance insulation to maintain the temperature and quality of food on the go
-Bags feature nylon, zipped PVC window pockets for housing order slips, menus, brochures, change or delivery instructions
-Metal steam exhaust vent releases moisture without releasing heat
-Strong, heavy-duty double carry straps
-Reinforced stitching to prevent tears and rips
-Reflective piping for safer nighttime delivery
-Adjustable backpack straps to make delivery comfortable and easy
-Integrated frame for added stability