The festival has an "exclusive" contract with Heineken.
The organisers of Electric Picnic are being criticised for not allowing a local brewer sell its products at the festival.
It has official partnerships with international brands like Bacardi and Heineken - which Ballykilcavan Brewery in Stradbally says are exclusive contracts.
Electric Picnic has been contacted for comment.
David Walsh-Kemmis from Ballykilcavan Brewery, which is less than three kilometres from the festival site, says allowing him sell at the event would be more sustainable:
Ballykilcavan brewery is just 2.5km from the site of the Electric Picnic (@EPfestival), but we are not allowed to serve our beers there. The festival claims to be sustainable, but despite our three national sustainability awards, we're still not allowed in. Here's why. pic.twitter.com/QGExg0tFDZ
— Ballykilcavan (@Ballykilcavan) August 17, 2023
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