3d Printed 510 Cartridge and Battery Pen Holder with 8 Spaces for cartridges/battery pens and 4 spaces for USB battery pen chargers. 

Makes storing your cartridges much easier and keeps them in an upright position to ensure the heating element of the cartridge stays saturated in the cartridge oil. This print has triple wall support and is a very sturdy plastic object. Empty cartridge and usb chargers not included. 
 
Each of the 8 cartridge/pen holding spaces are 12mm wide so they can accommodate most vape pen batteries of a small to medium size. They also hold the Arizer Extreme Q mouth pieces nicely.