I had a brainstorm a while back while surfing around looking for things to use as an e-cig case... a dart case! I've never seen this idea mentioned before. Here is a company that produces a lot of interesting cases:
GLD Products, Inc.: DartsDart Cases
I personally ordered the GLD Casemaster Super Bee case from this location:
Casemaster Dart Cases
I'm not a dart player so I don't know about darts, but this case is for Bee darts which are shorter than normal darts. This case works perfectly for my Janty Dura-C. I like a case as small as possible that can hold what I need.
Size comparison to cell phone:
Inside of case holding 3 assembled Dura-C's, 4 carts, 2 3ml juice bottles:
The right side of the case has 3 elastic loops to hold the e-cigs at the middle and 3 non-elastic pockets at the bottom (which are a tight fit for the battery, but don't need to be used). This case does not have belt loop or clip, but fits well in my pocket.
This is a great case if you want to carry your e-cig assembled... I wouldn't use if for my Pilot M401 because I carry that unassembled and use a slight smaller memory card case for that. The larger cases might be usable for longer e-cigs like the penstyle. Many different and interesting styles of cases available...
GLD Products, Inc.: DartsDart Cases
I personally ordered the GLD Casemaster Super Bee case from this location:
Casemaster Dart Cases
I'm not a dart player so I don't know about darts, but this case is for Bee darts which are shorter than normal darts. This case works perfectly for my Janty Dura-C. I like a case as small as possible that can hold what I need.
Size comparison to cell phone:

Inside of case holding 3 assembled Dura-C's, 4 carts, 2 3ml juice bottles:

The right side of the case has 3 elastic loops to hold the e-cigs at the middle and 3 non-elastic pockets at the bottom (which are a tight fit for the battery, but don't need to be used). This case does not have belt loop or clip, but fits well in my pocket.
This is a great case if you want to carry your e-cig assembled... I wouldn't use if for my Pilot M401 because I carry that unassembled and use a slight smaller memory card case for that. The larger cases might be usable for longer e-cigs like the penstyle. Many different and interesting styles of cases available...