The 10 Best Reservoirs For Hydration Packs

Get the most out of your water bladder with the Geigerrig Pressurized Hydration Engine (appx. $43). This highly advanced model uses a hand pump to deliver a steady stream of H2O with enough power behind it to quench your thirst, wash your hands, or even take a shower.

With a few handy -- but not overly complicated -- features, the Platypus Big Zip LP (around $37) captures the ideal balance between simplicity and utility. It's as easy to fill as it is to drink from, thanks to an extra-wide opening that closes securely with an attached slide-lock.

From one of the most respected names in the business comes the CamelBak Crux (around $34), a durable and ergonomic option that excels in a variety of environments. It's available in 3 sizes, and includes a self-sealing bite valve and a handle that makes it easy to refill.

Ultralight backpackers and other outdoor minimalists should check out the MSR DromLite Bag (around $30), which offers the same carrying capacity as similar bladders, but packs down to the size of its cap. That makes for incredibly efficient storage possibilities when it's not in use.

The fully featured Osprey Hydraulics LT (appx. $29) takes portable hydration to the next level with improvements like a 180-degree pivoting bite valve, welded baffles in the body and a hose with two disconnect points. Unfortunately, it also suffers from durability and taste issues.

At just 4.85 oz for the 3-liter size, the HydraPak Shape-Shift (about $28) is light as a feather, making it perfect for activities where weight is an issue. The 2L version is even lighter, but both come with an internal zipper that keeps water from sloshing around when it's half full.

You don't have to be in the military to appreciate the Source Tactical WXP (appx. $29), which is designed to make staying hydrated in the field as hassle-free as possible. It has a push-pull mouthpiece that doesn't require biting, plus an inner film that limits bacteria buildup.

If you're worried about getting wet on the trail or track, the Deuter 32931 Streamer (about $32) offers plenty of integrated defenses against leaks and spills. For example, a spring valve at the mouthpiece and a fold-over closure on top help prevent drips from both ends of the unit.

With a slim profile and a bare-bones design, the Platypus Hoser Hands-Free (about $27) is a great option for anyone looking for a simple bladder to put in an overstuffed backpack or small day bag. It lacks the added features of more expensive models, but it's still plenty versatile.

It may not compete with name-brand models out there, but at just over $10, the Cherainti Bladder 2 Liter is a steal for those seeking something for occasional use. It manages to pack a whole host of perks into the basic design, including a dust cap on the mouthpiece.