I carry a micro hand pump that takes about 150 pumps to get up to a decent pressure on a 700x23 tire so I also carry a CO2 pump that takes the non threaded cartridges for speed and ease of use.

If you drop a dime in the cartridge holder, you can use the inexpensive BB gun cartridges that can be had for about $0.50.

The 12 gram cartridge works perfectly to bring a 700x23 tire up to 100psi in an instant.

As it turns out, I had a flat on my morning commute today and it worked great.

I too have had multiple flats in a single ride so that's why I carry the hand pump.