great idea, I printed a few of these and have found them quite useful and even makes a nice gift if you add a persons name or make the parts in multiple colors.
the light blue marble PLA came out really nice and I was just trying something different with the keychain link to keep it centered.
if you don’t want to or can’t use PLA, a short piece of rubber band works too
You don’t need the TPU gasket if you’re not concerned with it being waterproof.
thanks and great job on the design 👍🏼