Supermarket Oil Bottles Contain Less Than Advertised

Hi everyone, I recently bought a 1L bottle of sunflower oil from Jumbo, poured it into my oil container which i always refill when it is empty, i noticed today it was closer to ~900ml than a full liter. Has anyone else in the Netherlands noticed this with cooking oil (or other products)? Is this normal (like some kind of filling tolerance), or are companies quietly reducing quantities?