Special treatment at the cellar door shop

The wine above was a special wine which is for sale at the cellar door only, but it was not on offer to all visitors. I got a taste of this wine with a view of getting me to buy it after I had shown more interest than other visitors in the way the winery was growing grapes. At some point in the discussion, the topic wandered to irrigation and I was interested whether they employed a technique called partial root zone irrigation. The man at the winery shop did not know the answer, but having sensed my deep interest in wine growing and making, then proceeded to show me and my wife the bottles "kept under the table top", and we got to taste many more wines, including this one, of which we bought a case. After this, he told us who to ask for at one of the other big wineries on the winery trip; with the result we also got to taste (and buy) some very interesting wines indeed.