I transport my Tube Mod in my Backpack and since I don't want it to leak and stand upright in there I made this little Holder.
I simply put it inside a Side pocket ob my Backpack and don't need to worry anymore.
In this "Stand" you can put a Tube Mod with a Diameter up to 30mm. In the smaller Compartments, there is Place for 2 18650 Batterys or one 18650 Battery and a small Unicorn Liquid Bottle.
I've designed two covers for the "Stand" so you can Cover the Battery and don't need to worry about a short.
If you want you to glue a little bit of foam inside of the chambers so it doesn't rattle and keeps the stuff stored snug to the holder.
PM Filament PLA