1. LifeStraw Personal Water Filter (Click Link to Check Price on Amazon)
Editor's Rating : 9.4 out of 10
Award-winning LifeStraw has been used by millions around the globe since 2005Removes minimum 99.9999% of waterborne bacteria (>LOG 6 reduction) and surpasses EPA standards for water filters

2. Etekcity Portable 1500L Emergency Camping Water Filter, 3-stage filtration , 0.01 Micron, Survival Kit Supplies (Click Link to Check Price on Amazon)
Editor's Rating : 9.9 out of 10
3 STAGE ADVANCED FILTRATION: includes pre-filter, 0.01 Microns antibacterial activated carbon filter and hollow fiber UF membrane inline filter eliminating 99.9999% of colibacillus, legionella, heavy metal ions, chlorine, volatile organic compounds (VOC), organic and insect contaminants

3. Sawyer Products SP128 Mini Water Filtration System, Single, Blue (Click Link to Check Price on Amazon)
Editor's Rating : 9.7 out of 10
Ideal for outdoor recreation, hiking, camping, scouting, domestic and international travel and emergency preparednessHigh performance filter fits in the palm of your hand

4. Survivor Filter - Reusable Portable Water Filter Straw with Triple Absolute Filtration to 0.05 Microns. Comes Assembled with Cleanable Ultra Filter, Replaceable Carbon Filter and 6 Cotton Pre-Filters (Click Link to Check Price on Amazon)
Editor's Rating : 9.9 out of 10
UNBEATABLE FILTRATION AND OUR USA TEST RESULTS PROVE IT: Tested in Columbus Ohio to show 99.9% Removal of Virus, Staph and Bacteria. PLUS - It comes with a LIFETIME WARRANTY! Accept no Imitations, Trust only the Trademarked Survivor Filter Name.THE ONLY FILTER THAT CAN BE TAKEN APART AND THE COMPONENTS CLEANED AND REPLACED: Membrane Ultra Filter Lasts up to 100,000 Liters (26,417 Gallons), Replaceable Carbon Filter lasts up to 1,000 Liters (264 Gallons) as do the Cotton Pre-Filters. PLUS - 5 Extra Cotton Pre-Filters are Included!

5. Survival Straw (Click Link to Check Price on Amazon)
Editor's Rating : 9 out of 10
Lightweight and compact emergency water filter system. Easy to use drink directly from any water source