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Carbonation. The balloon allows for the gases to expand it without the 'boom'

Trying to avoid this.... Balloon over the top instead of screwing the cap on helps :thumbsup:.
veitnamcam indeed there is and it is good but wondering if I can make my own for cheaper... Probably...

Anyone had a go?

Made ginger beer years ago as a kid, last year a mate gave me some of his and it had a definite kick (he reacted to hops in commercial beer).

Roktoy brought along some Macs...