Hey, it's great to hear the tank case from Hobby Lobby is working.
For something that only holds a couple of tanks you can use these battery cases that a lot of vendors sell. The case is thick enough to safely protect the tanks against an accidental fall. I used this to hold a couple of extra IBTanks on my car keys when I went to the Muse concert the other night. I was using my VV Gripper and Ovale V8.


Battery Cases : Nylon Battery Case w/ Carabiner
Edit: I had a video linked from the actual show I attended that was recorded from a phone, but the quality is better in this video from a different show.
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