Why bubbles in a glass of champagne, or sparkling wine, go straight up?

Have you ever noticed that the bubbles in a glass of champagne, or sparkling wine, go straight up? Researchers in the US and France have been studying the distinctive vertical bubbles which give the go-to party tipple its distinctive taste. Flavour molecules allow bubbles to rise smoothly up to the top. Not all the bubbles in carbonated or fizzy drinks behave the same way.