Perhaps this question is beyond the scope of the forum, but I'm seeking a daily commuter bag. I have the Chinao case and a STM Jacket for my Ipad. Now I need to tote the ipad and case back and forth to work (school - I'm a teacher). Currently I'm using an Eagle Creek duffle bag for my daily transport. While it's big enough and carries all of my stuff (including gym and cycling gear), I really need a bag for the following items: Ipad with case Lunch (often microwavable leftovers) Large 40 oz. stainless bottle for morning smoothie Water bottle Snacks Notebooks A few files Apple wireless keyboard A couple of books Misc. small items - glasses, pens, earphones, cell phone, other. I'm considering the Waterfield Cargo bag (probably medium), but I'm open to suggestions. I want something nicer than my duffle bag, but not a briefcase. I'd like to sling the bag over my shoulder, so perhaps I want some sort of messenger bag. I'd like to stay away from a daypack. I would prefer a bag where if my waterbottle or lunch container leaked (it does from time to time), that the leakage wouldn't damage the Ipad. Thanks for your help!