perfect for a 2-5 mile run, can store a car key or id

Super convienant and cute. Only thing i would suggest is some kind of cloth between the hand and the bottle. Once you have been running  while your hand gets slippery on the bottle. It just feels weird, but that would not keep me from buying another. It would just be and upgrade.

fabric stretches fast.

pocket holds a key and a gel

perfect size. Not too much water, not too little water. Easy to use. Pockets definitely come in handy for keys or GU chomps, etc.
Palm of hand may get a little sweaty and need to be wiped off but I'm sure all water bottles do the same thing.