The bubbles of carbon dioxide in carbonated beverages aren't buoyant in a weightless environment, so they remain randomly distributed throughout the fluid, even after swallowing. ... Even if a microgravity dispenser is perfected, there is no guarantee that carbonated beverages will be used in space.

What would happen if you opened a can of soda in space?

In micro-gravity, the light gas bubbles won't rush to the top of the liquid and escape. They will stay within the liquid. This means the astronaut will consume significantly more gas drinking a soda in space than one would drinking a soda on the ground.

Can of Coke in space?

Coke became the first soft drink to be consumed in outer space, when astronauts aboard the Space Shuttle Challenger tested the “Coca-Cola Space Can” on July 12, 1985. The Coca-Cola Company also installed the 'Space Dispenser' on the Space Shuttle Discovery, which was the first soft drink equipment to be used in space.