My wife & I are full time guides and have tries all kinds of hydration systems. Nothing compares to the reliability and flexibility of using this Tube Kit with 1L Platy bottles. We keep our water bottles in the side pockets of our pack, so we don't have to dig to get at them. One bottle has a drinking spout & the other this tube kit. I have used the same bit valve for years with no leaks or issues. Clean up is easy. Get the 90 degree shut off valve and the system is perfect.