If you have allergies, are a vegetarian or a vegan or can not consume certain foods, you should share this at that moment with the staff. They note this then and try to take this into account accordingly.
However, if something should end up in the basket, which you do not need, then it has become customary to store these foods on the packing table in the room. As a result, other people in need can take these products and nothing is wasted. If you need something from the packing table, you can of course take that too.