The Sawyer 1 Gallon Gravity Water Treatment System is a lightweight, robust solution for filtering large quantities of water. The 1 gallon pouch has a wide mouth for fast, easy filling. It is lightweight, only weighing 8 ounces. 

Included:
1 Mini filter
1 1 gallon pouch that can be reused hundreds of times
1 straw that can attach to the Mini filter
1 cleaning coupling
1 gravity hose with adapters
1 cleaning plunger

Full Description:
The Sawyer dual-threaded MINI water filter weighs just 2 ounces, fits in the palm of your hand, and is rated to 0.1 micron absolute filtration — removing 99.99999% of bacteria, such as salmonella, cholera, and E.coli, and removing 99.9999% of protozoa (such as giardia and cryptosporidium). The MINI also filters out 100% of microplastics.

With threads on both sides, you can screw the push pull cap onto the MINI for easy on/off functionality while filtering. Convenient and easily packable, this single- and dual-bag gravity system doesn’t require any pumping and is perfect for camping, hunting, fishing, scouting, disaster relief, and emergency preparedness kits, as well as on adventure travel excursions where potable tap and bottled water are not easily carried or safe to drink.

The 1-gallon bladders feature a wide mouth cap that allows for fast and easy filling, as well as a convenient carry handle. To set up a gravity system, first fill the reservoir with water from any source (a lake, stream, pond, glacier, kitchen faucet, etc.). Hang the bag — from a tree, the back of your pack, or hold it up with your hand — and connect the MINI to the included hose and let gravity do its work. Water will flow through the MINI to produce fresh, clean water for drinking and cooking.