speaking 1(7.24)

Water purification device

Portable, tube-shaped water filter

Designed for outdoor and emergency use

Hollow fiber membrane

Contaminants such as bacteria and single-celled organisms

Operates without batteries or a power source

Relying instead on the user's suction

Extremely small pores in the membrane

Particles as small as 0.2 microns

Outdoor enthusiasts, travelers to remote areas