The can pierce is an elongated, flat and short (approx. 10 cm) metal kitchen utensil with a pointed and bent bottom end with which you can prick pouring and air holes in cans of milk, fruit juice, oil, etc. It is often combined with a bottleopener or a corkscrew.
There is also a can pierce with a lid. There are two short nails in a round (plastic) lid. This way, the container can be closed after piercing.
See also paint can opener. [MOT]