I'm looking for shaving soap companies, preferably American, that offer samples. I've looked at Col Conk, W.T. Neumann, and Ogallala Bay Rum. The reason I ask is two fold. One, I don't want to get stuck with horrible smelling soap. Second, I have been known to be allergic to some products such as cologne.

Also, what should I look for in a shaving mug? Should it be heated? I've seen some people using like electric candle warmers to warm the soap. Is this necessary?