I designed this small bluetooth box with inspiration of the jbl clip and the really usefull carabiner. I also included this 18650 battery holder from enif
https://www.thingiverse.com/thing:456900
it fits a 1.5inch 5w driver and a passive membrane to create awesome sound.
parts used:
I used a 5mm metal rod to hold a carabiner but you could print that, too. though it wont be that stable.