I'm building up to run my first ultra this November and need some recommendations for some fuel belt (or equivalent) options. It looks like the model I use is no longer listed on fuel belt's site, but it holds a single 20 oz bottle, and has a single zippered compartment (with another zippered sub-compartment within). I like having the large volume capacity, but the pocket is only big enough to hold my car key and three gus, which is fine for marathon training, but inadequate for longer distances.
I don't think I'd be a fan of the hand held options, and most of those I've tried on have been too small for my hand size, anyway.
Any recommendations? It looks like fuel belt has a new model that might have some more room, but I haven't seen it in a store, yet...