$40.00 @ the liquor store. Converted into a bong + $20.00: Friends ripping: So I bought this, headed over to the head shop. I said these words "You know the new vodka bottle" instantly he knew what I needed. He handed me a down stem, a rubber grommit, and a slide all for $10.00. I then went to home depot and got a dremmel bit for cutting into glass and a dremmel sanding bit for stone. We then placed the bits into a normal drill. It took about 1 hour+ to make the hole. Enjoy.