My entry for the Tap'dNY Keep the Bottle Contest involves making a bong out of a used water bottle, a stem and cone, and a lighter. What's better than saving the environment and getting high while doing it.

Note: Use this at your own risk. Smoking is bad for your health, and if you get caught it's also bad for your criminal record.

Before anyone start flaming I would like to direct them to http://www.washingtonpost.com/wp-dyn/content/article/2006/05/25/AR2006052501729_pf.html

Step 1: Gather Supplies

To make this bong you'll need:
-An empty water bottle
-A bill, billie, bill piece, stem and cone, or whatever it is called in your area. Basically a hollow tube with a small bowl on the top. These are available at your local head shop, and can also be made out of things that you can get from a hardware store.
-A lighter (I recommend a BIC)
its better if you take a can from a drink (i used a redbull can) and a bottle from sobe life water just put a foil screen in the can slide. and dont call it a bong (thats illegal) its a water pipe for tobacco or non marijuana smokeables by the way is the name green day for the band or a day spent getting high
Great Instructable, we need more on smoking devices. Thumbs up!
Aside from the fact that this project facilitates an illegal act, it is interesting to note that the authors of the report you link to still state that smoking marijuana is dangerous, and not an activity to be recommended.<br/><br/>Additionally, CancerReliefUK report a <em>positive</em> link between marijuana use and bladder cancer.<br/>
who said you have to smoke marijuana, you can smoke coffee
true that! all the way
instead of buying a stem u can make one out of a clear plastic pen tube and a larger socket from a wrench kit. just take the socket to one end of the pen so that the wider open end of the socket is open for your "substance" :)
DO NOT DO THAT. You'll be smoking the plastic. In fact I strongly recomend to just buy a bong, plastic is really bad and burn really easy. I used this bong some time ago and I regret that.
*tape not take. sorry
man have i made my share of these, including a fully functional hookah. ill send u or post some pics of my creations. btw, i made the stem out of a pen, and the cone out of tin cans.
people I used to know were good enough with a lighter to flame either side of the neck of the bottle causing the plastic to contract, done correctly this puts a pinch like thing towards the top, great for stopping the water splashing up in your face from an overzealous hit. Obviously it reduces the internal volume so a larger bottle maybe needed. Also tilting the neck back slightly with the same method stops singed eyebrows when you're leaning right over the lighter. But then these guys did have too much time on there hands :)

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