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http://www.lifestraw.com/Q1. What is LifeStraw®?
LifeStraw® is a portable water purification tool that cleanses surface water and makes it safe for human consumption. It is just 25 cm long and 29 mm in diameter and can be hung around the neck. LifeStraw® requires no electrical power or spare parts.
Q2. What does LifeStraw® do?
LifeStraw® filters up to 700 litres of water and effectively removes most of the micro organisms responsible for causing waterborne diseases.
Q3. Which diseases will LifeStraw® prevent?
LifeStraw® kills disease causing micro organisms which spread diarrhoea, dysentery, typhoid, and cholera.
Q4. Which disease-causing micro organisms are filtered by LifeStraw® ?
LifeStraw® filters bacteria such as Shigella, Salmonella, Enterrococus, Staphylococcus Aureus and E .Coli.
Q5. Are there any tests to prove this?
LifeStraw® has been tested by independent and qualified research laboratories. Please see detailed test results.
Q6. How does LifeStraw® function?
LifeStraw® contains a specially developed halogen-based resin, an extraordinarily effective material that kills bacteria on contact. Textile pre-filters are used in the LifeStraw® to remove particles up to 15 microns. Active carbon withholds particles such as parasites.
Q7. What do the tests and research studies indicate?
The studies indicate the following:
• The level of bacteria in the water will be reduced to levels that will provide water safe for human consumption. ‘Safe' implies water from which any health risk is minimal.
• The particulate removal suggests that the number of any parasitic ova in raw water will also be reduced significantly.
• The released amount of iodine in water treated from LifeStraw® is not normally damaging to human health. (people having thyroid problems and allergic reaction to iodine must seek medical advice before using this tool.)
Q8. What is the life expectancy of the LifeStraw®?
One year from the start of usage (calculation based on consumption of 2 litre water per day) or 700 liters. Use beyond expiry will not deteriorate existing water quality.
Q9. What is the required daily water consumption?
The WHO default levels for the quantities of drinking water (reference to WHO drinking water quality guidelines Third edition 2004, Annex III), are:
• For a 10 kg child, 1 litre water per day - thus 700 days tool
• For a 60 kg adult, 2 litre water per day - thus a 350 days tool
Q10. Who can use the LifeStraw®?
Adults and children of any age can use the LifeStraw®, provided they have capacity to suck water through LifeStraw®.
Q11. How should LifeStraw® be used the first time?
First time users are advised to spit out the first couple of mouthfuls (40 ml) as a small amount of harmless black carbon water will be expelled on initial use. (See user instructions)
First time users may find it difficult to start sucking. This is because a natural brake on the flow of water has been put into the LifeStraw®, as a controlled flow between 100 ml to 150 ml per minute is needed to get the maximum benefit of the bacteria killing effect.
Q12. How can LifeStraw® be effectively utilised?
At regular intervals, it is recommended to blow out the last mouthful of water as well as some air through the LifeStraw®. This will clean the pre-filters of whatever sand, silt and debris that might have got stuck in the textile filters. (See user instructions)
Q13. Does LifeStraw® filter arsenic, iron, fluoride and other heavy metals?
No.
Q14. What is the impact of saline water on the lifetime of LifeStraw®?
It is expected that continuously drinking saline water through the LifeStraw® would reduce effective life to 350 litres.
Q15. Can I share my LifeStraw® with other people?
It is not recommended that you share your LifeStraw® with others . Any outside contamination of the LifeStraw® will not be compensated by inside purification.
Approximate cost: $3.00 per year.
http://www.medgadget.com/archives/2005/05/lifestraw.html