VANPET 1L Hiking Collapsible Water Bottles, 33OZ BPA-Free Plastic Flasks, Reusable Drink Bags, Foldable Backpacking Water Bottle for Travel Camping Hiking (4-Pack)

【Compatible with Various Filter Straws】This collapsible water bottle easily collects water from lakes, rivers, streams, and municipal sources. It’s compatible with Membrane Solutions, LifeStraw, Sawyer MINI, Micro Squeeze, and most 28mm screw-cap water filters, making it a reliable squeezable filtration system for outdoor adventures.