I love the Everywhere Bag from Baggalini: https://www.baggallini.com/everywher...-B0018-NS.html

Its light weight, water resistant, has a bazillions pockets—zipped and unzipped, the zippered back pouch can unzip and slide over roller bag handle. My iPhone 6+ fits perfectly into the open side pouch. Water bottle or compact umbrella fits into the zippered side pouch. I slide my iPad mini and Kindle Paperwhite into the large outside front zippered pocket, my compact camera goes in the small front zippered pocket, my chapstick, and other small items go in the front snapped flap, there’s a slot behind that for more small items, inside there is a large zippered pocket, plus credit card slots and I keep my cash, passport and extra credit cards in the removable pouch which is tethered by a clip inside so it doesn’t fall out. This still leaves most of the main compartment. It’s basically indestructible. I have other Baggalini bags and they last forever.