1. Hydration Bladder 70 oz / 2 Liter - Suitable for All kinds of Hydration Pack - Water Storage Bladder Bag - Water Reservoir Pack for 2L Hydration Backpack System (ArmyGreen, 70 oz) (Click Link to Check Price on Amazon)
Editor's Rating : 9.1 out of 10
★Professional military Hydration Bladder,Eco-friendly material,100% odorless, tasteless, BPA- Free material. Best for hydration pack.★FDA APPROVED: Food-grade premium quality anti-bacteria materials. Thick bladder material is pressure-tolerant and wear-proof.

2. Anglatech Fly Fishing Backpack and Vest Combo with 1.5 Liter Hydration Water Bladder (Click Link to Check Price on Amazon)
Editor's Rating : 9.8 out of 10
★ Redesigned for 2016★Includes 1.5 Liter Hydration Water Bladder

3. Tactical Hydration Pack Backpacks with 2.5L Bladder for Hiking, Biking, Running, Walking and Climbing (CP) (Click Link to Check Price on Amazon)
Editor's Rating : 9.6 out of 10
Adjustable shoulder/chest straps. Will fit chest sizes from teenagers/kids with 27" up to adults (men and women) with 50" chest size. The chest straps make sure it doesn't bounce when you move Whistle buckle for emergency

4. Premium Reflective Vest Hydration Pack has 3L 100oz Storage Pocket Give 1.5L 50oz Bladder as Gift for Hiking Running Biking Clothes Fits Women Men Safety Gear (Black) (Click Link to Check Price on Amazon)
Editor's Rating : 9.8 out of 10
Introducing a new BPA and FDA approved bladder that produces no chemical taste while in use. The bladder features a large mouth for easy infusing of water and washing it was built strong and Sturdy enough to retain liquids without any leakage in during a high intensity physical activities like biking, hiking, camping, kayaking, Skiing, hunting, Climbing and so on.

5. Nathan FireStorm Race Vest Hydration Pack, 2-Liter, One Size, Nathan Grey (Click Link to Check Price on Amazon)
Editor's Rating : 9.4 out of 10
Equipped with a 2L bladder with quick release valve and organizer pocket with key ring clip inside upper back pocketSlide Adjustable chest strap for perfect placement and bounce free ride and Easy on and off with full side Adjustability.