He brings them juice without the owner of the restaurant knowing; what should they do?
Question

                I have a friend who works in a restaurant and he brings us juice without the owner of the restaurant knowing, or he brings us ice and the ingredients for juice and makes it in my house. And juice is cheap. Do I have to pay for the juice or should I give the price of the juice in charity?.
Praise be to Allah.
    It is not permissible for a worker to take anything from the 
    restaurant for himself or his friends except with the permission of the 
    owner. That is because the Prophet (blessings and peace of Allah be upon 
    him) said: “It is not permissible [to take] the property of a Muslim except 
    with his consent.”

    Narrated by Ahmad, 20172; classed as saheeh by al-Albaani in
    al-Irwa’, 5/279. 

    Imam Ahmad also narrated (23094) from Abu Humayd as-Saa‘idi 
    (may Allah be pleased with him) that the Messenger of Allah (blessings and 
    peace of Allah be upon him) said: “It is not permissible for a man to take 
    his brother’s property unlawfully, because Allah has forbidden the property 
    of one Muslim to another.”

    Classed as saheeh by al-Albaani in al-Irwa’, 5/280 

    And it is well known that the owner of the restaurant would 
    not give permission for such a thing. 

    Based on that, it is not permissible for you to drink this 
    juice, and it is not sufficient for you to give its price in charity. If the 
    owner of stolen property is known, it is not permissible to benefit from it; 
    rather it must be returned to its owner. 

    The scholars of the Standing Committee for Issuing Fatwas 
    were asked: 

    My father works in a restaurant and the owner of this 
    restaurant is stingy, hence my father – along with other workers in the 
    restaurant – take some of the food without the owner’s knowledge. My father 
    brings 3 kg of meat every week without the owner’s knowledge. I said to him: 
    Why do you do that? He said: Because the owner of the restaurant is stingy 
    and he does not show us any kindness. I am a student who is still studying. 
    Is eating this food haraam? Please note that this food usually stays in our 
    house for approximately 4 days, and we do not eat anything else. 

    They replied: 

    It is not permissible for you to eat this food that your 
    father takes secretly from the restaurant without the owner’s knowledge, 
    even if the owner of the restaurant is stingy, because the worker is not 
    entitled to anything except his wages and other things that were stipulated 
    in his contract of employment. Based on this, it is not permissible for you 
    to eat anything that your father has stolen from the restaurant, because the 
    Prophet (blessings and peace of Allah be upon him) said: “The whole of a 
    Muslim is sacred to another Muslim, his blood, his wealth and his honour.” 
    Narrated by Muslim in his Saheeh, 2564. end quote. 

    Fataawa al-Lajnah ad-Daa’imah, 
    22/336-337 

    They also said in response to a similar question: 

    It is not permissible for you to consume any of the trade 
    goods except with the permission of their owner, because it is proven that 
    the Prophet (blessings and peace of Allah be upon him) said: “It is not 
    permissible [to take] the property of a Muslim except with his consent.” End 
    quote. 

    Fataawa al-Lajnah ad-Daa’imah, 
    14/29 

    So you have to refrain from drinking this juice and advise 
    your friend to repent to Allah, may He be exalted, and stop doing this 
    haraam action. 

    With regard to what he has previously taken from the 
    restaurant, he should either ask the owner of the restaurant to forgive him 
    or he should work out the value of these things and give that money to the 
    owner of the restaurant. It is not essential for him to tell him what he has 
    done; rather it is sufficient for him to make sure that it reaches the owner 
    by any means. 

    For more information please see the answer to question no.
    40157 

    And Allah knows best.