SteriPEN Adventurer

This UV Water sterilizer is not only small but it also intelligent. All you have to do is turn it on and stir the light end of it in the glass of water that you are not sure of drinking (like in third world countries). Do that for a minute and then take it out and drink the water. Easy and fool proof! If you take it out sooner than it needs to be in the water, then it gets angry and shows you a red light! It sells on Amazon.com for $130 USD. Source: Cool Hunting: SteriPEN Adventurer