Uses for Blue Filter Straw Drink straight from the water source;. Flow Rate for Blue Filter Straw 500ml/min. Lifespan for Blue Filter Straw 5000 L. 【Easy to Use 】Just hang on a tree or put the gravity water bag in a high place, hands-free filtration,enjoy effort-free (no pumping, no squeezing) filtered water within minutes.The operation of this gravity-fed water filtration system is remarkably straightforward.
