Looks like a thermometer? But it’s a genuine water purifier which uses Ultraviolet(UV) to kill virus, bacteria and other germs. 
As it is portable and handy, it fits right in your pocket where ever you go. It is designed in such a way that it can be easily used to purify a glass of water, bottle or even a water beaker. Especially useful for those who travel a lot and are susceptible to diseases due to water changes.
It’s the most suitable filter that has even reserved a spot at the Time Magazine’s most creative gadget.
It costs just $69.95
Buy SteriPEN from Amazon.com (free shipping available)
this can be easily carried with us to anywhere we go, that itself is the unique feature it possess that stands out from the rest.