Review on CamelBak Podium Flow Bike Hydration Belt - Stay Hydrated on the Go with Easy Access Bottle Pocket - Includes Podium Dirt Series Bottle - Convenient Adjustable Waist Buckle - Secure Zipper Pocket - Ideal Riding Belt - 21 Ounce Capacity by John Hall

I've been using it mostly for mountain biking for the past few weeks and I'm very impressed with this hip pack. I've never owned a fanny pack and wanted to try one, but don't spend a lot of money on the ones with built in water tanks. So this camelbak is for you. I can fit my wallet, keys, phone, Crankbros multi-tool and a small snack for trail trips. The water bottle is a bit small in terms of fl oz so I use it in my bike frame (has full suspension so it's perfect) and use a 22-24 oz water bottle in Camelbak. I read some reviews that said they can't put the bottle back in one hand and I disagree. I can reset my water bottle while driving by twisting it back and forth while pressing down. The water bottle is easy to put back in the backpack. The only minor inconvenience I've noticed is that it sometimes feels like it's slipping past my butt, but once I tighten the strap (it's hard to tighten very tight) it usually doesn't budge. All in all, this pack is perfect for me when I don't need to pack a full camelbak for mountain biking. Highly recommended.