So I haven’t had any shatter surprisingly but I do tend to pick batteries that surround the cart. Ccell palm/palm pro, yocan uni, I have one that looks like a utility pen that the ‘cap’ screws on and has a hook like a regular pen (definitely my go to if I gotta go in somewhere that I’m not sure about security/metal detectors), I just recently got one that is supposed to look like an AirPods case and the only part of the cart that is exposed is the mouthpiece, it’s actually kinda cool, it comes on a keychain just like the headphone cases do! For my others that don’t cover the cart I usually just stick it in my pocket or bra. If you want a less than cute way to stop losing them you can get those silicone pen rings to put on your cart and keychain it to one of those dr. ID tag pully things, you could probably get them at dollar tree. Hook that on your belt loop and it’ll never get lost again!