Water is essential when you're out camping or exploring. This water purification straw is an indispensable tool for every outdoor travellers. With this tool, you can can better complete your outdoor adventure. If you are looking for a new water purification straw, come and try this product, it will not let you down. Features: Portable Size&Easy to Carry: When you need to go on an outdoor excursion or adventure, the size and weight of what you need to carry are very important. This simple water purifier is small in size and light in weight, making it perfect for carrying. Easy to Use: It adopts the principle of pure physical filtration to directly filter the water into cleaning water that can be directly drunk. It can effectively remove harmful substances such as sediment, microorganisms, insects eggs, and bacterium in the water, making your drinking water safer. Wide Applications: Suitable for outdoor travel, hiking, sports, emergency, rescue, outdoor adventure, picnic, backpacking, huntings and emergency preparedness, etc. 4000L Water Filterable: The filter can filter up to 4000 liters of water, filtering to 0.1 microns and no battery required, no frequent replacement and saving you money. Lanyard Design: The product comes with a lanyard, you can hangs it on your wrist or carry it on a backpack. Specifications: Material: ABS Color: black, light blue, green, green-camouflages (optional) Package size: 250 * 110 * 45mm / 9.8 * 4.3 * 1.8in Package weight: 75g / 2.6ounce Packing list: 1 * Filter Straw with Lanyard (Optional)