Grayl GeoPRESS One-Way Valve-Clear ultrapress Lifespan will decline when filtering

Lifespan will decline when filtering and purifying water with high levels of silt

requires zero setup

Compatible with One-Way Silicone Valve for electrolytes and drink-mixes

Hunting and adventure ready

99% of viruses

Grayl GeoPRESS One-Way Valve-Clear ultrapress Lifespan will decline when filteringGive your GeoPress a boost! In April of 2023, we redesigned our Cartridges to accommodate a One Way Valve. It's a significant upgrade that includes a new "core" plus "flow channels" making it possible to add electrolytes, drink mixes and other flavored liquids into GeoPress. A feature no other drink thru filter bottle can deliver, the GeoPress One Way Valve allows electrolytes and sport drink mixes to be added to clean purified water without