WATER BUFFALO OASIS 2.0 HYDRATION BLADDERYour personal oasis. The Oasis 2. 0 is designed to put hydration out of mind so you can focus on the road ahead. The extra wide opening on the reservoir makes for easy filling from any source, even if youre filtering from a river midway through the ride. A baffle splits the bladder in two and prevents water from sloshing around letting you maintain your balance even with a full reservoir in your pack. No leaks here. The top closes with a sliding top