New, lightweight valve self seals after each sip and can be opened and locked with one hand to prevent leaks when not in use. A dust cover protects the silicone valve from outside elements.

Features:

• High-flow valve delivers water when you need it most.
• Self-seals after each sip and can be open and closed during activity with one hand.
• Dust Cover protects silicone bite valve from collecting dirt.
• Universal ¬º diameter fitting.
• Safe & Reliable 100% BPA and PVC Free.
• Diameter: 6 mm / 0.25 in
• Weight: 10 g / 0.4 oz
• Materials: PP/POM, Silicone