Making A Glass Bong

whats up? this is my first post after a long time of just reading but I need some help and figured this to be the best place.

Anyways I've got this awesome looking glass bottle that basically looks like a vertical donut with a stem at the top but i cant smoke out of it without a bowl and there is no where to put one.

So im planning on hopefully converting this thing into a bong and just wondered if anyone had any experience drilling glass or would even recommed a more effective way of doing this without cracking the glass?