1. Tactical Hydration Pack with 3L Water Bladder. Military Style Daypack Backpack for Hiking, Camping, Running, Biking, Cycling, Walking (Black, 3 Liter) (Click Link to Check Price on Amazon)
Editor's Rating : 9.3 out of 10
KEEPS YOU WELL HYDRATED! 3 Liter replaceable water bladder bag included. No need to buy a reservoir or bladder, our backpacks come with a ready to go bladder to keep you well hydrated throughout your expedition. The bladder also has a wide screw cap so you can add ice cubes to keep your water extra cool.PERFECT FIT. Comes with adjustable chest and waist straps so you can easily fit the backpack to match your physical requirements. These straps help keep the pack from moving and help keep in place. Ideal for outdoor sports such as hiking, camping, climbing, biking, cycling, walking, or running.

2. Lightweight Hydration Backpack Bladder Pack Daypack with 3 Liter/100 oz Reservoirs Water Bladder Bag for Hiking, Running, Camping, Climbing, Cycling, Walking, Hunting (Black Backpack + 3L Bladder) (Click Link to Check Price on Amazon)
Editor's Rating : 9.4 out of 10
2 count Means One Backpack and One Water Bladder.DURABLE MATERIAL - Hydration Pack is water-proof and anti-scratch and very nice looking,high quality zip and buckle.Adjustable chest and shoulder wide straps, thickening and soften back design, airflow system design, keep your back cool and dry and here is comfortable for you . Net rope for holding the helmetEXCELLENT DESIGN - The hydration backpack has large Capacity :17" x 9" x 7". Adjustable shoulder/chest/waist straps, 2 Front Side Pockets is enough to carry your wallet, keys, phone, towel, small tools or other items

3. ONEPACK 50L(45+5) Hiking Backpack Daypack Waterproof Outdoor Sport Camping Fishing Travel Climbing Mountaineering Cycling (Click Link to Check Price on Amazon)
Editor's Rating : 9.7 out of 10
HIGH-CAPACITY: Main compartment, two zipped front pocket, sleeping bag compartment, mesh side pockets, enough to bring a tent, roll up blanket, cooking gear, etc.to keep your stuff separate and organized no matter if it's a day trip or a week long journey.DURABLE: Made with high quality tear Polyester+ nylon fabric, anti-Scratch,with strong hanging system to carry more items, provides extra strength and long-lasting performance with the lightest weight possible.

4. Hydration Pack with 2L Backpack hydration Bladder From HappySmile, Great Waterproof Cycling Hiking Climbing Hydration Backpack for Man Woman Kids (Click Link to Check Price on Amazon)
Editor's Rating : 8.8 out of 10
FIT YOUR SIZE: Adjustable shoulder/chest straps. Fit chest sizes from 28" up to 49" chest size. Adjustable shoulder strap and waist strap to makes sure it doesn't bounce when you move.ENOUGH CAPACITY: Large capacity of more than 7 Liters, Double-layer compartments fit your 13" laptop,clothes,iPad and phone. Two side pockets and one more little pocket for even more space.

5. ZOMAKE Hydration Pack High Quality Professional 25L Hydration Backpack With Waterproof Cover Great for Hiking - Biking - Running - Excursions - Lifetime Guarantee(Black) (Click Link to Check Price on Amazon)
Editor's Rating : 9.9 out of 10
HYDRATION BLADDER COMPARTMENT: There is a compartment in the main pocket designed for putting 3L Hydration Bladder, keeping you hydrated for a day when you are in various sports activities. Hydration Bladder is NOT INCLUDED.UNIQUE HELMET NET: With unique helmet net which is a good helper for outdoor cycling. Front mesh storage pocket with hook and loop closure for hanging tools and sports gear.