Only the one, it lives inside the box it came in tucked away in my saddle bag.
I carry 1 tube, 3 tire leavers, multitool, minipump, asthma pump and a small bottle of antihistamine.
The bag is a topeak one, a bit larger than Adrians above.
Sometime, when Im feeling a bit crazy Ill attach the pump to the elastic under the bag and put my phone and wallet in the bag. But shht, dont tell anyone.