Now it did take me about 6 months to "make", simply because that's how long it took me to empty the bottle. Definitely not gonna waste whiskey! Other than that, assembly took less than a minute. I found the separate soap dispenser pump at Bed, Bath and Beyond, and luckily it was a perfect fit.
To make: Wash the bottle out (try not to soak the labels), fill it with soap, screw your pump on and it's ready to go! Man cave approved!