Yes, get the water filter. REI is a good source. Other camping equipment distributors probably have entirely adequate filters also. Not a new technology. Also, speaking as someone who has experienced Giardesis -- infection with the Giardia bug, protazoa, or whatever the hell it is -- you want to filter all your water carefully. Take care not to splash water up from the water source into your clean water stock. In my case I had no idea the "pure" mountain water about 9,000 feet about 30 - 40 miles west of Denver had any bugs in it and drank with disregard of any hazard. In my case the incubation period was about two days. Giardesis will put a distinct cramp in your hunting or fishing activity.