I found this picture in this web, and I personally find it very funny.
Things as “this bottle of milk can contain milk” makes me laugh about how stupid human race can be.
Legal department will tell you that these type of sentences are here to protect us of potential sues. This culturally comes from USA, but in Europe the labeling of the products started to contain this type of protective sentences: the sentence above was read by me from a tetra-brik of milk.