The following are the 10 best cool grinders:1. SLX Aluminum Non-Stick Herb Grinder2. The Chopper Automatic Handheld Grinder3. Grindhouse King Kut Electric Grinder4. Cloudious9 The Auto9 Fully Automatic Grinder5. Heady Dad Troy Grinder6. Budeaze Herb Grinder7. The Bzz Grinder8. ONGROK 2 Piece Grinder9. Rebel Initiate Glassworks Ceramic-Coated Grinder10. Famous X 1 Stage Herb Grinder