LifeStraw Steel is ideal for hiking, backpacking, camping and travel. The 2-stage filtration process removes bacteria and protozoa and reduces organic chemical matter and chlorine. Features Uses replaceable activated carbon capsule to reduce bad taste, chlorine and organic chemical matter for up to 100 liters Uses advanced hollow fiber membrane technology (0.2 microns) to remove waterborne bacteria and protozoa up to 264 gallons or 1,000 liters Durable stainless steel body Specifications Portable: only 9" (21 cm) long and 1 inch (3 cm) in diameter Sturdy and durable design Replaceable activated carbon capsule Meets US EPA drinking water standards Requires no electrical power or batteries BPA free and contains no chemicals Food grade stainless steel meets US Food and Drug Administration regulations and standards No aftertaste: LifeStraw doesn't use iodine or iodinated resin chemicals Weight: 160 gr. (5.6 oz)