Gold Box Deal of the Day on Amazon is for up to 43% Off Select Lifestraw Products.  The product pictured is the LifeStraw Family unit.  LifeStraw Family uses advanced hollow fiber technology. Water is forced through narrow fibers under high pressure. Clean water exits through tiny pores in the walls of the hollow fibers, but bacteria, protozoa, and other contaminants are trapped inside the hollow fibers and are flushed out by backwashing — making this a highly efficient method of filtration.

LifeStraw is made by Switzerland-based Vestergaard. Founded in 1957, Vestergaard is a large public health company specializing in complex emergency response and disease control products.