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Each year, more people reuse greywater from the bath, shower, bathroom sinks, and (laundry) washing machines that hasn't been in contact with human waste.
LifeStraw Personal Water Filter
Ensures you have emergency light without taking up precious space. Get it here for $19.99.
Rectangular 50-gallon food-grade plastic tanks connect for large or small volumes of rainwater and grey water collection and reuse
DIY water filter
Lightweight and portable, the LifeStraw Family Gravity Purifier makes purifying water at a base camp or car-camping site a breeze. It's also great to have at home in the event of a natural disaster.
How To Make A DIY Death Ray | Self Sufficiency Skills for Outdoor Cooking, Purifying Water and More by Survival Life http://survivallife.com/2014/03/21/make-diy-death-ray/
Is one type better than the other?