What is the white thing in Guinness Draught bottle?!

Question: What is the white thing in Guinness Draught bottle!?
Everyone is partially wrong!.

The widget is actually filled with beer!. Prior to sealing, the can/bottle is pressurized with CO2 and nitrogen!. The widget, already in the can, receives the same pressure as the rest of the beer!.

When the can/bottle is opened, pressure is released through out!. The pressurized beer in the widget shoots out (much like a water pistol)!. THis spray kicks up all the gasses, giving you that Guinness head!.Www@FoodAQ@Com

Kclightman and Robert are wrong!. The thing is indeed called a Rocket Widget, but it releases nitrogen into the beer, not CO2!. Nitrogen provides the nice creamy head without carbonating the beverage!.

P!.S!. My answer is not partially wrong!. Guinness Draught does not use co2!.Www@FoodAQ@Com

kclightman and robert are right!.

It's often called a "rocket widget", as it differs in shape from the normal sphere shaped ones in the Guinness (and Kilkenny, and Boddingtons, etc!.!.!.) cans!.Www@FoodAQ@Com

A little canister that releases carbonation when the bottle is opened!.Www@FoodAQ@Com

its a widget!!!Www@FoodAQ@Com

It is a co2 cartridge--to make the beer a draughtWww@FoodAQ@Com

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