These are tiny little test tube markers, which were initially only available with my 'We've got chemistry' sock sets. I've got a few spare sets, so off to new homes they go!
The test tubes are cut on fluorescent acrylic, and only available in a mix of the colours shown, on either 6mm rings or bulb pins. The test tubes each have different designs on them; chemistry, toluene, lab coats, hearts, stars, and strands.
If you have any questions please let me know!