According to Islamic scholars, if any impure thing falls into a liquid other than water—such as milk, oil, or juice—then that liquid becomes impure immediately, even if it is more than two qullah (about 193 liters).
However, if a small animal that has no blood, or has blood that does not flow (like a fly, mosquito, or flea), falls into the liquid, then the milk, oil, or juice does not become impure.