this may work, as long as it's non conductive material, and there is no chance that a complete circuit can be created. Battery cases are fairly cheap though. and you can pick them up at a vape show or online retailer when ordering new coils or juice. https://www.amazon.com/Battery-Storage-Holder-Organizer-SACKORANGE/dp/B06XSXW2KX/ref=sr_1_3?dchild=1&keywords=18650+case&qid=1600713411&sr=8-3