The product description of this Hyrule Coffee mug over on Etsy pretty much says it all:
An exclusive drink served at The Milk Bar and Latte located in the home of East Clock Town. This is only available to members and must have proof of membership to purchase such a fine beverage- made with only the finest Chateau Romani (an expensive vintage milk) at a price of 200 rupees per serving. 🙂
I’ll take two, please.