Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: What exactly is this and how do you use it?
Document: Does exactly what it says it does.
This product does exactly as described and worked great just doesnt last as long as id think. It stopped workin in less thana month got very clogged and hard to blow through. Was used by a daily smoker
Overall: Does exactly what it says it will. I haven't used it long enough to comment on longevityPros:-Completely eliminates smell and particulate matter.-Fits nicely in a bag, glove box, or pocketCons: I can't find any yet.Note that several other reviewers have commented on this devices limited longevity. Like all filters, this will eventually get clogged and/or loose effectiveness. Smokebuddy makes a full size model for those requiring maximum longevity.
works well for the price havent used it to much but ive seen it work when i use it .
Not worth buying the junior/miniature version when the normal one is only $3 more and you can get more than double the use out of it.
works love it. you might be able to smell a little so be cautious. but works depending on how you use it. easy fun cool piece
Small but OK. Thus thing works but is way to small for normal everyday use. Get the full size version.
It was clogging after one day of light use. Completely unusable after two days. I left caps off as suggested by other reviewers.
Great product, good size, no problems yet, but my friend'a stopped working within a week. Hoping to get more use!
Perfect!! Love it! I have the large one for home and this is perfect for travel. U could use in a bathroom in a pinch or a car all day!
Answer: It hides the smoke and smell.when you smoke, before you exhale, put your mouth on the small hole and exhale. You can't see the smoke come out the other end and it won't smell like anything. Make sure the caps are off both ends though.