New moves forcing pubs and restaurants to show the prices of soft drinks more clearly will be unveiled today.
The Government initiative follows complaints from customers who claim they have been hit by expensive soft drinks without being able to see the price before they buy them.
Department of Trade and Industry (DTI) research has shown that pubs and restaurants that display the prices of soft drinks charge less on average than outlets that do not display prices.
Pubs and bars will have to show a range of soft drink prices so customers can see them before they are served.
Restaurants will also have to show prices with their menu at or near the entrance.
The new laws will come into effect next March.
Consumer minister Gerry Sutcliffe said:
"People are entitled to know how much they are paying before they order.
"We have received complaints about the lack of pricing transparency, so we have taken action."
In addition, all outlets that accept payment in foreign currencies will have to display any additional costs, for example commission and handling charges.