I don't post here often, blame my anti-social tendancies, but I've decided to this time. 
I'm working on a project for myself, as the title may have lead you to beleive, it's a Super Bag. 
Basically, it's a bag that'll have everything I could ever possibly need; Water bottle, pocket knife, flashlight, disinfectant and bandages for falls and spills, nail clippers. (I always notice they need clipping when out and about) 
It will even have a bag for carrying things in! Groundbreaking, I know. 
What sort of things can you suggest for a Super Bag, or what sort of things would you need to have on yours?