Extra Replacement Filters for the Straw and Squeeze Filter OFFICIAL Replacement Carbon Filter for Survivor Filter Model L600 Triple Filtration Water Filter Straw. USE FOR UP TO 1000Liters INTEGRATED mouthpiece with filter tip included. EASY TO REPLACE: Simply remove used Carbon Filter Mouthpiece/Filter Tip and replace with the new one ! BEWARE of IMITATIONS: Use only Official Survivor Filter replacement filters to keep your Survivor Filter Triple Filtration Water Filter Straw in top condition.