Install a camera and let everyone know a camera is installed in the lunch area. This is if you want to be/need to be very strict about things.Send an email to all workers to not remove someone elseu2019s food from the fridge. Put a note in the lunch area, something to the effect: u201cIf itu2019s not your food, donu2019t take it. Bring your own food.u201dMilk and cream is problematic. Unless itu2019s clearly identified as belonging to a specific person, it might seem that it is there for all. I never used otheru2019s coffee creamers, but I know several people who assumed that it was put there for everyone to use. Or if 2 people decide to buy in because certain foods go bad and someone sees 2 people sharing from a container, they might be led to believe that itu2019s communal.