bike Pump: for commuting, bike packing, touring or leisure riding.
For the ultimate 'fail-safe' solution, how about doing the same as us at PRO BIKE TOOL HQ, we carry BOTH. We mount one of our mini pumps on a bike frame and carry a CO2 inflator with a couple of cartridges in a saddle bag or cycling jersey. We then know we're covered for any eventually, especially for those rides with punctures that tend to come in twos or threes...you know the ones.