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SteriPen

SteriPEN is a gadget designed to sterilise...

...water making it safe to drink and cook with.

Resembling a large bottle of nasal spray, SteriPEN is a compact device which uses ultraviolet light to sterilise water and make it safe for drinking. 

Ultraviolet light is energy-rich, electromagnetic energy naturally emitted from the sun. And while it can also have many adverse affects (this is why we wear sunscreen), when introduced to contaminated water, it destroys the ability for bacteria and viruses to reproduce. Once the DNA or RNA in virus or bacteria absorbs the UV light, it can no longer reproduce, effectively killing the organism and making it harmless to the human body.

The mechanics of the SteriPen are simple: It has a long, clear wand that lights up similar to a neon or fluorescent tube light. The wand on the end of the SteriPEN's body allows the UV light to transmit into the water. Each SteriPEN model works the same way. The small mechanical body produces the UV light and the wand captures and disperses it throughout the water. Each SteriPEN has a cleaning cycle and times vary depending on the model.

It's important to understand that while UV light sterilises water; it doesn't remove bad odours or tastes as chemicals or carbon filtration would. The best possible solution for water purification would be a combination of sediment and particle removal followed by carbon filtration and then UV light sterilization. This gadget won't rid your water of any funky smells or coloration. You can use chemicals and carbon filters for that. But the SteriPEN will kill the bacteria that give you travellers diarrhoea such as E. Coli so you won't get sick while you travel.

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