The categories of: Outdoor Gear, Rafting Gear, Hydration have these products:

Base Camp Water Filter by Katadyn North America Inc. Price: $69.95	Combi Microfilter by Katadyn North America Inc. Price: $199.95	Combi Rplcmnt Element - Ceramic by Katadyn North America Inc. Price: $99.95
Hiker Microfilter by Katadyn North America Inc. Price: $69.95	Hiker PRO Microfilter by Katadyn North America Inc. Price: $79.95	Mini Rplcmnt Element - Ceramic by Katadyn North America Inc. Price: $49.95
Nalgene-comp Stash hydration by Backcountry Access Price: $25.00	Pocket Microfilter by Katadyn North America Inc. Price: $349.95	Pocket Replacement Element by Katadyn North America Inc. Price: $199.95
Siphon Filter by Katadyn North America Inc. Price: $64.95	Vario Microfilter by Katadyn North America Inc. Price: $89.95