Here's some pictures of me putting together my springtail cultures:

Hardwood charcoal. Crush to smaller sizes (more surface area), great excuse to have fun with a hammer.


Boiling the charcoal.


Straining off most of the water and quick rinsing any charcoal dust off.


Then all you need is a ziplock and some springtails!


I like to keep an amount of water in the tupperwares and at least bottom of my cultures so they never come close to actually drying out.