He takes home some things that the company has thrown out
Question

                I work for a company which provides us with meals each day. I do not eat some of it; I collect it and take it home with me. And they throw out some files so I collect them and take them home. What is the ruling on that?.
Praise be to Allah.
    It seems that with regard to these meals, the company gives 
    them to their employees and workers to keep. The basic principle is that if 
    a person owns something (i.e., it is his to keep), then he may dispose of it 
    as he wishes, Based on this, there is nothing wrong with you taking home 
    what is left of your own meal that the company bought for you, unless the 
    company has specifically stated that nothing should be taken away. In that 
    case it is not permissible for you to take it. 
There is nothing wrong 
    with taking the files that have been thrown out and making use of them, 
    because if a person throws something away, the one who takes it becomes its 
    owner. The Standing Committee was asked about cheap or worthless things that 
    are found in the trash but are fit to be used – is it permissible to take 
    them home and use them? They replied as follows: If the situation is as 
    described and those things are things that no one would care to keep, then 
    there is nothing wrong with taking them and making use of them. 

    Fataawa al-Lajnah al-Daa’imah, 15/455.