After 50 years (on the market since 1950), this filter still has a reputation as the finest available for extreme conditons, for world travel, expeditions, mountain tours and disaster relief assistance worldwide. The only personal water filter backed up with a 20 year (lifetime in the USA) warranty. The recently upgraded design has a round pump handle grip with a shock absorber making pumping painless and comfortable. The ceramic element has a pore size of 0,0002mm (0.2 micron) and reliably holds back all pathogenic bacteria and protozoa such as: giardia, cryptosporidium, salmonella, amoebas, e-coli etc. Clean the used ceramic element by brushing the surface with an abrasive pad. An included measuring gauge makes it easy to know when you need to brush.
Features: - Technology: 0.2 micron ceramic depth filter (cleanable) - Output: about1 quart per minute - Capacity (depending on water quality): 13,000 gallons or 50,000 liters - Weight: 20 oz; 550 g - Dimensions: 10 x 2.4 ''; 24 x 6 cm - Ceramic Replacement Cartridge: 8013619
Katadyn Pocket Filter 
After 50 years (on the market since 1950), this filter still has a reputation as the finest available for extreme conditons, for world travel, expeditions, mountain tours and disaster relief assistance worldwide. The only personal water filter backed up with a 20 year (lifetime in the USA) warranty. The recently upgraded design has a round pump handle grip with a shock absorber making pumping painless and comfortable. The ceramic element has a pore size of 0,0002mm (0.2 micron) and reliably holds back all pathogenic bacteria and protozoa such as: giardia, cryptosporidium, salmonella, amoebas, e-coli etc. Clean the used ceramic element by brushing the surface with an abrasive pad. An included measuring gauge makes it easy to know when you need to brush.