Tradition of the Lucky Bauble - It is thought if you hang it in your window it brings luck
Apprentices used to secretly practise blowing baubles when the Master Glass Blower had gone home.
Before he returned, the baubles had to be removed from the kiln and hidden away.
This meant the baubles were often thrown around the workshop - many breaking in haste! The ones that didn't smash were deemed lucky and proved lucky when given to friends and family.
(photo below of engraved Lucky Baubles is for illustration, with mini baubles we are limited for space)