wow- thats one impressive phone case!
Thankfully the case I got (the type pictured) is fine for around the house, keeping all my stuff together, except my juices of course, but I have little kids, so the ones I use daily are up high anyway. I mostly only do short trips out of the house (professional mom- so i don't really go anywhere) so it should be fine.
I'll likely need something much larger though for all day trips out, something big enough to hold a charger as well as multiple batteries and tweezers, paper towels, etc. The mini camcorder case I saw at walmart looked to be about the right size, although I didn't open it to see.