Joseph Wood of Liberty Brewing explains the origins of his TPPA beer (Trans-Pacific Pale Ale) which he will unveil at a Brothers Beer session beer challenge over the weekend.

New Zealand craft brewers are using the TPPA as inspiration for new and exciting beers.

Just days after the Trans Pacific Partnership Agreement (TPPA) was signed in Auckland on New Zealand craft brewers started putting their own spin on TPPA.

The TPPA is a free trade deal between 12 countries including New Zealand, Australia, Brunei, Canada, Chile, Japan, Malaysia, Mexico, Peru, Singapore, the United States and Vietnam.

BEVAN READ/FAIRFAX NZ Liberty Brewing owner Joseph Wood says brewing a TPPA beer was an obvious choice.

Thousands of protesters took to the streets the day the agreement was signed expressing fears about foreign investors and corporations intervening in New Zealand through an Investor State Dispute Settlement (ISDS) mechanism, which allows them to seek damages from countries who breach the TPPA.

There were also concerns about the Government's lack of transparency.

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* TPPA signing: Thousands take to the streets as trade deal is made official

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At least two craft brewers have already jumped on the opportunity to produce beers named after the controversial deal.

Auckland's Liberty Brewing owner Joseph Wood said he brewed a trans pacific pale ale (TPPA) craft beer as a bit of tongue in cheek.

Considering there had been plenty of media interest in the TPPA he thought it'd be a good idea to use that anagram.

"I thought it was a given really," Wood said.

The beer was made using hops from trans-pacific partners including New Zealand, Japan, Australia and the US.

"It's a pretty hoppy beer."

The variation of hops gave the 4 per cent beer an interesting flavour profile, he said.

It had soft malt flavours like hay bales. The Japan hops gave it a coconut texture. The US and New Zealand hops gave it tropical fruit flavours such as passionfruit and gooseberry and the Australian hops produced hints of banana and watermelon.

"Everyday it changes of course.

"For a little beer it's got a pretty complex flavour profile."

Only 50 kegs of the TPPA beer were made, and most would be sent around Auckland with some going to Wellington.

He brewed the 4 per cent beer for a session beer competition being held at Brothers Beer in Auckland on Sunday.

The annual competition, now in its third year, will have 26 craft brewers put forward their best session beers of 4 per cent alcohol or lower.

Wood won the first year with his Citra Junior beer but he was playing down his chances of winning this time round.

"My hopes aren't that high of winning so I'd say it'd be just a one off bach."

The TPPA fermented in about three days, he chucked some dry hops in for two days before refrigeration and filtration on day seven, he said.

"I left it till the last minute to be fair, which is OK because small beers ferment fast."

Wood said the TPPA deal would benefit small businesses like his.

"It opens a gateway for us exporting over to Asia without paying tariffs."

That would help make its pricing more competitive overseas, he said.

"That's all I really care about it."

Christchurch beer brewing company Ghost Brewing had also produced a 4 per cent trans pacific pale ale (TPPA) using New Zealand, Australian and US hops.

It's described as having grapefruit, nectarine and orange notes.