I needed to strain out all the little bits of bark, fruit, spices, and more from my bitters. There are a few ways to do this, including Buchner funnels from the chem lab, coffee filters, french presses, Brita filters and cheese cloth. I’ve tried some of those, but this is my new favorite method: the Aerobie Aeropress. Intended as a travel “espresso” machine (more like concentrated presspot coffee to be honest), it’s a handy filtration/extraction piston you can buy for around $30. Once strained, these bitters are ready for bottling.
Aeropress bitters strainer