People could steal it but the owners get an alert that someone is trying to steal it and the only way to open it is from the person who ordered it

The robot has something on top of it that protects the item and the only way to open it is from the person who ordered the food

That is true but the owners of the robots will get an alert that someone is trying to steal it and the only person to open it is the person who ordered it

The robots have sensors that can see if they are in danger and they would get out of there as soon as possible

Where is the winter though?

It has sensors to see danger. If there is danger it goes to the nearest safe place.