Hydrapak Blaster Bite Valve
Here's what other sites are saying:
The Blaster Valve from Hydrapak represents an entirely new design. The intent was simple - produce the best, highest-flow valve on the market and they surpassed their goals. The high-grade compression-molded silicone sheath feels great in your mouth and features the highest water flow on the market. The Blaster Valve allows you to gulp water to cool your thirst.
Hydrapak Blaster Bite Valve FEATURES of the Hydrapak Blaster Bite Valve High-grade compression molded silicone sheath Twist on/shut-off valve Easy disassembly for cleaning Standard on current Hydrapak models SPECIFICATIONS of the Hydrapak Blaster Bite Valve Fits drink tubes with 1/4 inch inside diameter