Every cyclist knows that flat tires suck but carrying a pump can be a pain, which is why we like CO2 cartridges and an inflator. But even these can take up a bit of space in a jersey pocket or saddle bag. The Genuine Innovations Hammerhead weights just 26 grams and it works with most threaded cartridges so there is less to carry.
Genuine Innovations Hammerhead CO2 Tire Inflator Official Website