After receiving the subjects' responses to their questionnaires, Dr Barefoot and his colleagues divided the group into five sets, depending on whether they were drinkers of beer, wine, spirits, none in particular, or no alcohol at all.

ECONOMIST: Alcohol and health

There was a lot of sitting around waiting while lights where moved and sets were changed and Richard Griffiths and Denholm Elliot took turns bringing in wine.

BBC: Your memories of Richard Griffiths

Though Riedel makes hundreds of types of wine glasses, seemingly one for each grape and Mr. Riedel strongly recommends having multiple sets of glasses for different varietals I decided I'd use one type of glass for my swirling exercises.

WSJ: The Art��and Science��of Swirling Wine | On Wine by Lettie Teague