Weighing in at just 5.5 oz, the durable Personal Water Bottle Filter from Sawyer offers a lightweight yet highly effective solution for ensuring clean water on the go. Designed for versatility, it works seamlessly with the included bottle, a hydration pack or as an ultra-light filtration option. The filter features Sawyer's Squeeze filter with a 0.1 absolute micron hollow fiber membrane, removing 99.99999% of bacteria, such as salmonella, cholera and E.coli and 99.9999% of protozoa like giardia and cryptosporidium (Independent Testing Laboratory Hydreion, LLC.; Microbiological Report S05-03). Perfect for hiking, backpacking, camping, ultralight backpacking and emergency preparedness, this filter delivers fresh, clean water quickly with a high flow rate. The bottle includes a 63mm cap that fits most wide-mouth bottles and is fully field-maintainable with the included backwash syringe. The package also contains two replacement drinking straws. Backed by Sawyer's limited lifetime warranty, this filter is designed to keep you hydrated during your outdoor adventures, just as Sawyer has been supporting outdoor enthusiasts since 1984.