I love my Camelbak water bottle. I carry this everywhere and it is awesome because the special valve doesn't leak so I never have to worry about anything getting wet. I also find that I drink more water when I use this water bottle because I always have it with me. The greatest feature of this water bottle is the built in filter that allows me to fill the bottle with regular tap water and it filters the water as I drink it so I don't have to worry about buying purified bottled water.