12g CO2 Canister holder

I am in the process of selling my BB gun and it's CO2 cartridges, but I didn't have a good container for shipping, so I decided to design one. Can be secured with cable ties, and I would STRONGLY suggest you put something like foam over the caps.

When wrapped, take care not to drop it. The heads are fairly flat in this configuration, and that could be pretty bad.

This is also suitable for anyone wanting a decent way to store them.