Hydration-reservoir family offered in multiple capacities, using a HyFLO self-sealing bite valve, high-mounted quick disconnect, silver-ion reservoir treatment and a wide-opening design for easier filling, cleaning and drying. Platypus rated the EVO generation for roughly 50% faster flow than the prior Big Zip LP.
WHAT MATTERS
50% Faster Flow vs Big Zip LP
Platypus rates Big Zip EVO flow about 50% faster than the prior Big Zip LP generation.
HyFLO Self-Sealing Bite Valve
HyFLO bite valve pairs with a leakproof shutoff valve for fast drinking and transport control.
High-Mount Quick Disconnect
High-mounted drink-tube quick disconnect simplifies reservoir loading and unloading from packs.
Silver-Ion Reservoir Protection
Embedded silver-ion treatment helps protect clean water from mold and bacterial growth on reservoir surfaces.
Wide-Opening Easy-Clean Design
Wider opening, one-handed pincher grip and semi-rigid baffle support easier filling, cleaning and drying.
GTW TAKE
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FAST WATER ACCESS WITH REAL COLD-WEATHER TRADEOFFS
The Big Zip EVO is the better tool when steady hands-free hydration keeps you moving, especially on active hikes and hunts. The tradeoff is complexity: hoses can freeze, reservoirs demand more cleaning, and it is harder to know exactly how much water remains than with a bottle.
Hands-free drinking makes frequent hydration easier while moving.
The wide opening and quick disconnect improve filling and cleaning.
A bladder carries close to the body and uses pack space efficiently.
Tradeoff: freezing hoses, cleaning, drying, and uncertain remaining volume make it less dependable in cold weather.
