Cigarettes and alcohol are often described as having an ‘inelastic price’.

Explanation

A product with an ‘inelastic price’ means that consumption doesn’t really depend on how much it costs. So you could increase the price of alcohol and cigarettes and people would tend to still buy them. A product with an elastic price means that a change in price would have a large affect on the number of people who bought the item. See p.95 for more details on price elasticity.