Lifestraw 2 Stage Membrane Replacement Micro Filter (Fit The Go and LifeStraw Universal )LifeStraw Go 2 Stage Replacement Filter is compatible with all LifeStraw Go 2 Stage Water Bottles and LifeStraw Universal. The long lasting membrane microfilter lasts up to 4,000 litres (1,000 gallons) of water. Whilst, the activated carbon filter lasts up to 100 litres (26 gallons) of water with proper use and maintenance. Stage 1: Hollow Fiber Membrane Removes 99. 999999% of waterborne bacteria), including E Coli Removes 99. 999% of waterborne