I bought this backpack to use as an alternative to a medium purse on vacation. I want the weight to be distributed evenly across my back instead of on one shoulder. It holds an iPad, wallet, small camera, phone, small umbrella and a 1/2 liter water bottle. The iPad (with Apple's basic cover) barely slips into the back outside zippered pocket. If you do that it opens up a lot more space in the main compartment.The outside has an open compartment/pouch on each side, but they are not big enough to hold a water bottle. You might get a small phone in one (my blackberry doesn't fit). A latch/hook for keys would be a good addition. There's also a zippered compartment on the front which is slightly smaller than the one on the back (iPad doesn't fit here).This is manufactured with the same quality fabric and detailed workmanship that I have found in my other Stephanie Dawn purchases. The straps are adjustable in length but not detachable.