I like to keep some on hand at all times for a number of reasons.
1. A completely new and clean carto for the curious to try my ecig with.
2. Wrapped and sealed, easy to transport in the pocket or purse without mess. (and I know it's brand new and clean for the visitor)
3. Too busy, too sick, too tired, too lazy, too forgetful to prepare my own the day before.
4. Some, like the Honey Flu Cured, actually taste better to me than the liquid, so I use both. (top off as needed)
5. They still come with condoms....