The following are the 10 best plastic herb grinders:1. Grasscity Plastic Magnetic 3-Part Herb Grinder2. Budeaze Herb Grinder3. Travel Herb Grinder & Stash Jar4. Storz & Bickel Volcano Herb Mill Grinder5. Highroller Grinder and Fastpack Cone Filler6. The Bulldog MedTainer7. Herb Saver Grinder8. Smokezilla Magnetic Plastic Grinder9. Zamnesia Acrylic Grinder10. Grasscity Acrylic 3-Part Herb Grinder