Why should I stop using the plastic grinder I got for free in Amsterdam (or some other negligent store)?

When grinders are made out of cheap materials like plastic, they break down easily and leave microparticles in your sacred plant mixture. We have even heard stories of not-so-micro pieces of plastic falling making their way into a joint! Do your lungs a favor and invest in a proper grinder that you can keep for more than a few months.

Are Aluminium grinders safe?

Though they are certainly better than plastic grinders, we recommend investing in a brass or stainless steel grinder if you can afford it.