Off I went to Chawri Bazar and procured some 10mm and 12mm (ID) pipes. I already had a heat gun. One crucial element was s solid silicon pipe, which helped ensure no kinks or twists after heating. Here are three pipes that I made.
My only concern is whether these are food grade acrylic. If they are not then water mixed with CO2 will definitely react and make these change colour. Fellow hobbyists please do share your views.
![Image](http://i1132.photobucket.com/albums/m565/apuda2011/IMG_20150321_230908_zpseavb90ch.jpg)
![Image](http://i1132.photobucket.com/albums/m565/apuda2011/IMG_20150321_230938_zpstairqbvo.jpg)
![Image](http://i1132.photobucket.com/albums/m565/apuda2011/IMG_20150321_230952_zpssjkvehqn.jpg)