1. Buy a bottle of Jack Daniel's, or another pretty bottle of booze.
2. Have a fun night with friends and drink all the booze.
3. Buy a bottle of liquid soap - choose the fanciest pump you can find.
4. Pour soap into Jack bottle and screw on the pump.
Okay, I didn't drink all the Jack, I bought a flask and filled it with Jack Daniel's. And now I also have a present for my sister-in-law's fiancé. Welcome to Tennessee!
Please Note: I bought Caldrea soap from Target (it was in the kitchen section, not with the soaps). From what I can tell, the pump thread is a universal size, but you have to be careful to get a pump that does not bulge out at the spring as it will not fit in the bottle neck.