Does its job well.
You blow smoke in, and no smoke or smell comes out the other end. It works wonders when you have roommates or live in an apartment. If you are a heavy smoker it lasts many months before it gets too restricted to blow smoke through anymore.<br /><br />The downside is, its not refillable. They most likely use activated carbon inside of the filter, and you can buy that for cheap at pet stores. With a PVC pipe, some activated carbon, and something to cap the ends you could make this for yourself.
Rating: 4 stars