The built in high filter effectively removes impurities, enhances water purity for direct drinking during outdoor activities such as trekking and backpacking Clear volumes markings help track water intakes, while the soft, enduring bottle withstands pressure, ideal for jogging, climbing, and various outdoor activities Made from food grade soft, this water bottle is none odors, and flexible for easy folding, making it light weight and space saving for outdoor adventures like hiking and camping The straw styles nozzle allows quickly water access without unscrewing the lid, enabling single hand operate during running, cycling, or other sports Wide Mouth: Features a large opening for easy filling and cleaning, with a proof cap and leak proof strap to spills and