Meg has suggested an April Spool's day post of bobbins and pirns. Here are some of mine:
From left to right:
Le Clerc's plastic ones, the Swedish cardboard ones, Saori clear plastic ones, timber ones in various sizes and bamboo ones. The last 2 types are for my Japanese boat shuttles.
However, being April Fool's day, the joke is on me as I don't actually have a bobbin winder that the timber and bamboo ones will fit so they have not really been used yet......