Found these for $20. Mini salt and pepper shakers. Are about the diameter of a quarter and 6" long. You use them one handed and press the plunger down to grind your salt and pepper.

I am going to jazz them up with some medical and sci-fi looking stickers and add either colored translucent plastic or make a small ring of multi colored vials for the glass area to represent liquid/various anti-toxin choices. Bonus in that the grinder rod actually extends out of the tube and makes a nice hiss like sound when the plunger depresses.

Will post up more pics once I PF them.