A lifestraw is better at removing bacteria, viruses, and protozoa. See page 7 here. https://www.who.int/water_sanitation_health/publications/hwt-scheme-round-1-

A lifestraw is better at removing bacteria, viruses, and protozoa. See page 7 here. https://www.who.int/water_sanitation_health/publications/hwt-scheme-round-1-report.pdf https://www.who.int/water_sanitation_health/publications/hwt... I don't know the cost of lifestraws to NGOs, but I guess they're more expensive. And you need one lifestraw per person, where these sachets can do bulk buckets of water.