miniature safety pin (smallest possible)
needle cap (either hooded or normal)
Step 1: Shape the tip
2. Flick the bic lighter and hold the flame for a few seconds. Make sure you are not in a cold location because the metal guard on the lighter will not get hot enough.
3. Place the straw of the needle cap approximately 2/16 inch from flame. Don't let the straw enter the flame. Allow the plastic to soften for about 3-4 seconds.
4. Let go of the button on the lighter releasing the flame. Immediately take the soft part of the straw and press it flat against the warm metal guard of the lighter. Do not press too hard, just enough to lightly seal the plastic. The seal should be a very thin layer that closes it shut.
Step 2: Create the aperture
6. Put your mouth over the flute (part that connects to the can) or straw and blow some air through it. This will ensure the cap is not still sealed.