• Innovative Detachable Design: Our WS02 water filter straw now is the only detachable straw on the market, both ends can be disassembled. That means it just needs to replace the filter element anytime and anywhere, no need to replace the straw tube shell frequently, which is truly reusable, money-saving, and more environmentally friendly
• Superior Backwash Solution: Detachable mouthpiece connects with the common bottle for backwashing, no need for an extra syringe, make cleaning easier. Camping water filter does not expire like water purification tablets and does not require batteries, very easy to use
• 4-Stage Filtration: Our backpacking water filter is made up of 0.1-micron hollow fiber ultrafiltration membrane, coconut shell GAC filter, and double PP fiber filter. Removes 99.99999% of harmful heavy metals, iodine, chlorine, bad odor, make water taste better. What's more, it can maintain the optimal flow rate (500ml/min) while the filter pore size is smaller. Long lifespan to provide at least 5,000 liters clean water
• Compatible with Various Filter Straw - This collapsible water bottle can easily fill lakes, rivers, ponds, snow water, stream, and municipal water sources. It can be used with Membrane Solutions water filter straws and most water filter straws with 28mm screw caps as a squeezable water filtration system
• Self-Standing Base & Measurement Scale - Stands upright when full and has measurements on the side to see how much water is in the bottle. Especially convenient for people who love outdoor sports, hiking, camping, fishing, cycling, travel, fitness, hunting and so much more. Also perfect as a water bag for emergency