At this point in Queensland's flood crisis it is all about the small mercies, and while the XXXX brewery in Brisbane may be flooded, supply will not be affected.

The brewery off Milton Road was flooded as the Brisbane River peaked yesterday at 4.46 metres.

"Luckily we do keep the majority of our finished product in a separate warehouse at Hendra, which is on higher ground," corporate affairs manager Leela Sutton said.

"No stock has been impacted and we're continuing to make deliveries to people that we can in non-affected areas.

"Obviously we'll have quite a clean-up job on our hands at the breweries now that waters have started to recede."

Fourex is also donating $100,000 to the flood relief appeal, is matching its staff's donations, and has donated $180,000 worth of stock to pubs in flood-affected areas.