The bottle is cut out at the bottom part and it is taped with a piece of aluminum foil fitting tightly and closely around the edges, so that there should be no passage like hole or crack to allow air get in. While doing all these things, there are certain things which one should never forget. Then the cap is screwed back firmly ensuring if the straw is onto the almost finished vaporizer. There should be no crack left and all the holes must be airtight. Here one must make sure if the hole is air tight, if need be, some tape should be put around it at the cracks.
It is better and safer to go for vaporizer with temperature control device.If one wants to make a vaporizer from household stuff, one can do it simply by following certain steps: a) First of all a plastic bottle, Aluminum Foil, Tape, Straw, smoking Herb, and Lighter or Match are taken and two holes are made into the cap of the bottle. Then the hole is released and the vapor is inhaled through the straw. Soon after the herb starts liberating whitish vapor. At this moment the hole without straw is covered with finger till there is enough amount vapors inside.
d) Now comes the time for heating the herb which is done with the help of a lighter putting it under the aluminum foil. At the same time one must know that it is not exactly vaporization, because the way it is heated, it starts combusting the herb which burn the active ingredients without turning them into vapor. After that a straw is taken and put through one of Powder Metallurgy (PM) Parts Suppliers them. c) Now the cap is unscrewed and the herb one wants to smoke is put through the top of the bottle. Aluminum foil liberates harmful burnt chemicals when heated with a lighter, so it is awfully hazardous for the lungs.This can save several bucks. As far as the other hole is concerned, it is meant for breathing in the vapor