It's a great information about Coffee Grinder! I use a eropress while travelling - it is great coffee maker for camping trips. I also carry around my hand coffee grinder and it seems to be a great conversational topic.
Another high-quality, conical burr grinder. It's clean and quiet, and it doesn't heat up. That helps to protect the essential oils and flavours in the coffee. It can hold 5oz of ground coffee when you're done. $100.