3d Printed 510 Cartridge and Battery Pen Holder with 4 Spaces for cartridges/battery pens and 1 space for a USB battery pen charger. 

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 charger not included. 
Each of the 4 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.
 
Item Measurements are Below: 
30mm Wide x  20mm Tall x 41mm Long
 
**Glow Version requires UV light (Sunlight, Plant Lights) to charge the glow effect. Standard household lights will not work well. The glow effect lasts between 2-4 minutes. The left photo shows what the item looks like in regular lighting.