LifeSaver is well known in Europe for its water storage and purification systems. They are bringing out a new item called the Wayfarer.
Priced at under $100 it removes 99.999% of viruses, 99.9999% of bacteria, and 99.99% of cysts and parasites from freshwater sources. This pump-style filter will produce 1.4L per minute and up to 1,320 US gallons over the life of the filter medium.