The ease of use of a hydration pack, without actually having a hydration pack on your back. That was the idea behind the AutoClose valve on BBB’s new AutoTank water bottle. Grab it and drink from it, as simple as that. The AutoClose works similar to a valve on a hydration bladder. It lets water through when you want it to and is always ready for another thirsty sip. Yet it prevents any spills or drips when it’s rattling along in your frame.