Drinks
Beer.
By European standards the beer is fairly cheap in supermarkets and pretty expensive in bars. In bars, it is typically served in measures of 0.2 litres, and one of these will typically set you back 1.50 euros, with prices as high as 2 euros not being unusual. In supermarkets and grocery stores the prices are a fraction of this. The beer itself is mostly one of Cristal, Super Bock, or Sagres. Super Bock tends to be a little sweet, with the other two being a touch more robust and northern European in style.
Wine
Portugal produces a good selection of wines, both red and white, and in young sparkling and traditional styles. There is bound to be something for everyone who likes wine, and the supermarket prices make it extremely tempting to try them until you find one to suit. Don't forget that Portugal is also the home of port wine, and an excellent place to try a few glasses of the stuff.
Coffee.
As in Spain, the coffee tends to be extremely good, with a robust flavour, and comes most often in pretty cheap shots. Expect to pay around 50 cents for a single shot. Various options are avaiable, including meia leite (like con leche in Spanish - basically a cappucino without the froth on), and galao (which is more like a latte). If you can describe anything else, such as iced coffee, most cafes will have a go at making it.