why does guinness beer have a ball in it

Guinness puts that little plastic ball in the can to recreate the smooth, creamy “on tap” pub pour by using nitrogen, not just regular carbonation.

What the ball actually is

• The ball is a hollow plastic sphere called a widget.

• It has a tiny hole and is made from food‑grade plastic so it is safe to be in the beer.

How it works in the can

• During canning, liquid nitrogen is added and some gas and beer get forced into the widget before the can is sealed.

• When you open the can, the pressure drops suddenly and the widget shoots nitrogen (and a bit of beer) back into the liquid, creating a burst of tiny bubbles.

Why Guinness uses nitrogen

• Nitrogen makes much smaller bubbles than carbon dioxide, which gives Guinness its signature thick, creamy head and velvety mouthfeel.

• This mimics a draught pour from a pub tap, so a canned Guinness looks and feels closer to a freshly pulled pint.

Extra nerdy details

• A pint of Guinness can have hundreds of millions of tiny bubbles, far more than a typical lager, thanks to the nitrogenation system.

• The widget was such a brewing innovation in the 1980s–90s that it even won major invention awards and became part of Guinness’ brand lore.

Quick recap (TL;DR)

• The ball is a nitrogen widget , not a prize or weight.

• It releases nitrogen when you open the can, forming the cascading bubbles and creamy head Guinness is famous for.

Information gathered from public forums or data available on the internet and portrayed here.