(Forbes) - There are ways to get better value for money when you order wine at dinner. Sure, you already know that the restaurant has to mark up the price it charges you — there are lots of people who need to be paid.

But there are ways you could easily do better or worse, if only you knew what code words to use, or to avoid. For instance, which phrase is better: good value, or good price?

Plus there are actions you can take, which might seem subtle, but actually communicate directly with the sommelier in a way that they are unlikely to miss.

To find out what you need to know, I asked Mark Oldman, author of ‘How to Drink Like a Billionaire,‘ who explains the intricacies of restaurant wine in this video.