$19 Device Instantly Turns Any Water into Drinking Water

Etekcity's Personal Portable 1500L Water Filter Purifier  can be attached to any bottle or the include bag, and filled either with water from a river, lake or pond.

It removes 99.9999% of colibacillus, legionella, heavy metal ions, chlorine, volatile organic compounds (VOC), organic and insect contaminants.

Some highlights from the product page:

• 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
• SAFETY TESTED:  This water purifier has been tested by the TüV SüD Institute and meets EPA Water Quality Standards. The pouch complies with the FDA’s Food Contact test in accordance with 21 CFR 180.22 to ensure maximum quality and safety
• DEPENDABLE ACCESSORIES:  The filter kit comes with a foldable water pouch for collecting water, a longer straw to attach to the filter, and a syringe for cleaning and lifetime extension
• PREPAREDNESS: S mall and lightweight, ideal for backpacking, camping, hiking, scouting, and more. Store in emergency preparedness kits and survival bags to constantly be prepared for when disaster strikes
• FILTER MORE:  This filter will provide up to 1500 liters of safe drinking water from any source like creeks and streams whether clean or dirty

Sources: Etekcity and BGR