Preferably a glass, of the appropriate shape and size. Flutes for sparkling wines for me, I don't like those wide glasses. Beer in a pot/schooner/middy for domestic lagers, a tulip glass for nice fragrant ales. Coffee is also good in a glass, as is black tea with a slice of lemon, hey I've seen Doctor Zhivago. At work I use a mug with pictures of my kids on it for cold water, coffee, and red wine, hey it's a newsroom.