Whats the name of that keg?

Hi,

I want to take a sugar primed keg to a party in a few months.
I have seen a type of keg that i want to use but i don't know its name and cant find it on the net.

It seems like it has a hard  outer case. While primed beer is in a bag inside the case i think. It is connected to a co2 tank that creates pressure between the inner bag and the case thus forcing/squeezing the beer out.

Ever seen this? Is it any good? What is it called?

Many thanks?

Danny

I think you're talking about a PartyPig. I've not used one, but like the concept. Here's a link: http://www.partypig.com/

Thanks,

Ye something like that.
Is it possible to find bigger ones though, barrel sized?