Image: Yormii
The MillMii is a manual pepper grinder with a difference. For those with arthritis or otherwise limited use of their hands, the difficulty of working a manual pepper grinder means they're relegated to using battery-operated ones, which leave behind a larger carbon footprint. Nathan Bestwick, an industrial design student at the UK's Sheffield Hallam University, noticed the lacuna in the market and designed a manual grinder that can be operated without the user needing to form a grip: the device is held between two palms and rolled to create the grinding action.  Oh, and they look pretty cool too.

The MillMii is available here.