Collapsible Water Filter Bottle, Durable Soft Flask, Multi-Stage Filtration Using Nanofiber, Improved Taste, Easy Squeeze Fast Flow, for Hiking Backpacking Travel Camping, 16.9oz, Blue

The 500mL dual-layer collapsible soft filter flask built for outdoor people who are tired of basic single-membrane filter systems that clog instantly the moment you draw from anything but perfectly clear mountain streams. Traditional hollow-fiber and membrane filters choke easily on murky water, sediment, and tiny floating particles you meet on the trail. Our dual-layer design solves this with an outer sediment pre-filter that catches all the coarse stuff first, protecting the inner PAC filtration media and massively extending usable filter life — no more stopping to backflush every 5 minutes, no more slowly disappearing flow rate on day 2 of your trip. The embedded PAC activated carbon layer is where this bottle truly stands apart: it strips out chlorine, strange hospital-like odors, and unpleasant metallic aftertastes from your water, so what comes out actually tastes clean and refreshing. You can squeeze and drink straight from the flask without making faces. The fully collapsible TPU body flattens completely empty, packs tiny, and goes everywhere with you: multi-day backpacking sections on the Appalachian Trail, Rim-to-Rim Grand Canyon treks, Nepalese high-altitude hikes at 4900m, Boundary Waters canoe camping trips, Costa Rica hotel tap water filtering, Indian village travel, Morocco 10-day road trips, and your weekend car emergency kit that sits in the glove box just in case. BPA-free, food grade silicone mouthpiece, leak resistant screw cap. Filter is fully replaceable — once you flow through the rated volume of water, swap a new cartridge and keep using the same soft flask you already trust. Package contents: 1 x 500mL Collapsible Soft Flask with dual-layer filter pre-installed. Perfect lightweight upgrade from standard squeeze filter bottles for anyone serious about their backcountry hydration.

• Multi-Stage Filtration And Wider Contaminant Removal - Combine outer PP pre-filter and innner core filter with electro‑adsorption and mechanical filtration, this filter features longer lifespan from clogging and removal ability for a broader range of contaminants while retaining beneficial minerals for natural water taste. Each filter cartridge delivers up to 200 liters of clean water
• Fresh Taste, No Chemical Odors - Built-in powdered activated carbon (PAC) reduces chlorine and chemical tastes commonly found in tap water. Micron-sized silver incorporated into the filter media helps keep the filter interior clean
• High Flow Rate, No Struggling - Mechanical filtration with MFP (mean flow pore) in 1–2 micron size range maintains a consistently high flow rate with low pressure drop. Drink smoothly and effortlessly
• Fill, Filter, Carry - Built to perform reliably across everything you encounter outdoors: clear mountain streams, glacial snowmelt runoff, alpine springs, quiet forest lakes, trailside puddles after rain, and even uncertain tap water during international travel. The screw-top lid with pull-out mouthpiece keeps from leakage
• Built For Practics - Collapsible soft body design compacts down flat, saving your space and weighting 2.2 ounces when empty. Replaceable filter cartridge with easy installment