Cap comes unpierced.

Use a sharp hook to pierce cap to desired hole pattern and thickness.  Reusable cap.

Tip:  After using your cap, wash thoroughly with warm water and dry.  Dust the inside of the cap with talcum powder and store in a dry, cool place.

Tip:  If you have a spare streaking hook, sharpen the head  using a disposable nail file.  This will make it easier to pierce your cap.  Please note, once you sharpen your hook, you will not be able to use it again for streaking/frosting.