Is it permissible for employees to consume beverages and food designated for passengers as a form of courtesy, given that the administration does not provide meals for employees and is aware of this?

A Muslim must seek out what is lawful in his food, due to the Almighty’s saying: "O you who have believed, eat from the good things which We have provided for you," and due to the Prophet, peace and blessings be upon him, saying: "No body nourished by unlawful means will enter Paradise." The Prophet condemned not being scrupulous about money, saying: "A time will come upon people when a man will not care whether what he takes is from lawful or unlawful sources." You must seek permission from the company's management or owners for the food you consume, for the long working hours and the provision of meals for colleagues do not justify taking what is not yours.