【Fresh Water Instantly】：Ginkin Filter Straws are a camping gear and equipment for emergency situations. It's necessary when camping, hiking, mountain climbing, hunting, trekking, backpacking, biking, boating, car rides, outdoor trips and wilderness adventures. 【Easy To Use】: Get down close to the stream or lake and use it to drink straight from the source, or fill your water bottle and insert the filter to start sipping. 【Advanced Technology】: Outdoor Personal water filter can filter up to 99.9999% of the tiny material, sand, sediments. Built with 0.01-micron ultrafiltration membrane and can absolutely provide up to 1500 liters of drinking water.