Another method to make the hole is to punch it out with a sharp needle, or carve it out with an exact-o knife. Just make sure it’s not larger than the pen. {“smallUrl”:“https://www. wikihow. com/images/thumb/8/81/Make-a-Quick-Bong-Step-5Bullet1. jpg/v4-460px-Make-a-Quick-Bong-Step-5Bullet1. jpg”,“bigUrl”:"/images/thumb/8/81/Make-a-Quick-Bong-Step-5Bullet1. jpg/aid2106663-v4-728px-Make-a-Quick-Bong-Step-5Bullet1. jpg",“smallWidth”:460,“smallHeight”:306,“bigWidth”:728,“bigHeight”:485,“licensing”:"<div class="mw-parser-output">

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You can also make this hole with a needle or an exact-o knife.

You’ll want to slide the pen in as far as possible, so the ideal angle is for the end of the pen to touch the bottom of the bottle on the opposite side of the hole.