Abstract: A programmable locking assembly for an insulated food grade container, such as a food delivery container, that can be unlocked by the recipient of the container by pressing a number code on the keypad of the lock, causing a locking finger to slide out from a zipper pull on the lid of the insulated food grade container to allow the recipient to unzip the lid to gain access to the contents of the container, thereby preventing the food delivery person to access the contents of the container while in route to making the delivery. In an alternate embodiment, an audio tone can open the lock without the user needing to press numbers on the keypad. The number code and/or the audio tone are texted to the recipient's cellular phone from the sender of the container.