Plan on taking a rugged camping trip soon or venturing to far away lands on vacation? If I were you, I would bring the SteriPEN - Portable 48-Second Water Purifier along. Simply insert the SteriPEN into 16 ounces of water, turn it on and wait 48 seconds. Voila! You now have pure, clean & safe drinking water. The ultra-portable SteriPEN uses UV (UltraViolet) Light to purify the water and destroy microbes, germs and viruses at a 99.99% success rate! There are so many great uses for this thing: vacations, emergencies, hiking or you just don't trust the water supply!