Is smoking a waterfall/gravity bong toxic?

[Maui Wowie]

I've been smoking from the same water bottle for about 2-3 weeks and the sides of the opening start to get white and if I puff I cough hard and my throat gets very painful. So how toxic is it? I havent't been able to find any information on this anywhere. Lungs get hotter even faster so thats's not a great long term option.

Also what are some easy makable alternatives to smoking besides?

[johnnyh]

get a real piece theyre not hard to find, if it feels toxic it is toxic

[faded247]

Get a real pipe.

Or a new water bottle.

[DOUGAL25]

"Any carbon-based material produces hazardous
products under most combustion conditions, mostly due to incomplete
combustion."

This is if you burn it, but I suppose if the sides are changing color, they might be getting hot enough.

Reference-
Burning Plastic (http://www.newton.dep.anl.gov/askasci/chem00/chem00031.htm)
:stoned:

[maka1pitbuu]

i wouldnt use a plastic bottle..

get one of those sobe drink glass bottles it has a little notch at the base that can break out with a screw driver or scissors and make a nice hole for a waterfall bong. make a hole in the metal cap pull off the rubber withing the cap. place a screen in the top and u have a nice bowl.