This is called a shave mug, but it's actually a scuttle. This allows you to soak your brush in the bottom and have your soap in the top, where you can lather it up and get yourself ready for a great shave. Col. Conk makes very high quality products and they've been in business for more than a century and a half. What's cool about this is that this particular product probably could've been sold at any point during that long span of time in business. It's classic, but it still works perfectly for what it does and a lot of people won't go without one of these.
If you want to give your bathroom the look of a real barbershop, this is one of the accessories that will help you do that. This would look absolutely perfect with a straight razor, though a safety model or anything else would work, as well. From a practical standpoint, consider the fact that you can have your brush soaking the entire time that you're taking care of the rest of your grooming, so it will be ready to go when you want to tackle those whiskers and make yourself look your best.