Offering a faster-than-ever flow rate and the same taste-free hydration you've come to expect from Platypus, the Big Zip EVO reservoir has your back on hot days of outdoor adventuring. Whether you're hiking to your local lookout or mountain biking your favorite trails, the improved flow rate and self-sealing Bite Valve valve make it easy to get hydration when you need it, while the leak-proof shutoff valve, handy grip, and secure SlideLock make it easy to operate. Plus, thanks to Platypus' clean taste guarantee, along with embedded Silver-ion to keep away mold and bacteria, you can have peace of mind as you hydrate yourself on countless adventures.

• Hydration reservoir with a clean taste and quick flow rate
• Self-sealing bite valve improves flow for more effective hydration
• Silver-ion treatment protects clean water from mold and bacteria
• Leak-proof shutoff valve prevents leaking in your pack
• Sliding lock and one-handed pincher grip make it easy to fill