Many pubs have brought in bigger wine measures which cost drinkers more and could lead to increased health and drink-driving risks, a new guide has warned.
The standard 125ml wine glasses used a few years ago is being replaced with 175ml measures, according to the Good Pub Guide 2006.
The Guide says drinkers are often not aware how much alcohol the larger glasses contain.
The Guide is also calling for all pubs to adopt the 125ml wine glass as a standard size. It says the unit of alcohol is a recognised measure for safe driving, diets, and health.
"People are unwittingly putting themselves over the limit and also having to spend more for wine which they perhaps don't want," said the guide's editor Alisdair Aird.
"Your first reaction is to think it is generous but it is a concealed cost increase which may be putting you at some risk”.
