My katadyn vario is nearly 90 dollars. Granted it is compact and works,but it requires energy and a cartridge every 500 gallons. this one is pure ceramic and silver.In my opinion it blows away my Vario. If you have a storage program,or just think you might need water if the power goes out for $22.50 you can probably never do better.Here is the link.
Monolithic Marketplace - Just Water, Ceramic Drip-Filter
Monolithic Marketplace - Just Water, Ceramic Drip-Filter