Scalpmaster Rubber Shaving Mug – Black. $ Professional shaving mug is the perfect tool for traditional wet shave; Raised inner ring holds the shaving. William Marvy Rubber Shaving Mug - Green ColourFeatures a raised ring in the bottom so that your shaving soap doesn't spin. This mug is constructed of. This classic rubber mug will bring you back in time to a 50's barbershop with its vintage green color. This mug is virtually indestructible and won't chip, crack or.