Xiaomi Mi True Earbuds Basic 2 ear hook

Xiaomi Mi Earbuds Basic 2 True Wireless ear hook so they don't fall out of your ear.
They can even be placed inside the charging box (but you need to take them off to charge.

Printed in ABS. 0.2 layer height. It also let me use a slightly bigger silicone ear bud for them because they don't need to go all the way in your ear.

I recommend you use a brim.