This film is intended to have little or no meaning. Although it may appear, due to the title, to be acted in a specific way and to convey the connotations of that title - it is not.
It is simply a few shots of a boy eating some bread then pouring himself a drink. He just happens to be in quite an atmospheric location surrounded by almost nothing of significance.
Our mind is never drawn into a conclusion about metaphorical representations. E.g.: The cup and the bread. The dissolves within the two sequences. What else is in the fridge. Why are there other things by the sink. - etc...
Although you may think you see a pattern or a narrative there is never an allusion to one. The pattern is simply created by your mind's conformed desire to create one.
However, you may see the film this way:
A young boy is left alone in a world of bleakness. Left only with a slice of bread and a small drink to comfort him whilst his life slowly comes to an end.
His eyes stare at his blank plate, longing for more food. His blank plate denies him any more nourishment.
The drink he pours is the last drink in the bottle. The milk in the fridge is empty and slowly his resources are being used up.
As we see the final shot - our formed ideas of that world are shaken.
We have, for the past few moments, held a strong opinion about what this film is meant to mean.
And that last shot offers us the escape to realise that there is no constructed meaning of the sort.
Though our mind will be strong in opposing the change, and will try and make sense of what we see rather than accept the last few moments were simply manipulated ideology resulting in a meaningless movie.
Either way - You can take meaning from this film or you can accept it has no intended meaning.
Both are correct - but both are not my desire.