Lifeboat Foundation

UNSW Sydney engineers have utilised sound waves to cut the time it takes to make a cold brew coffee from many hours down to mere minutes.

Fans of cold brew coffee often rave about the smoother, less acidic and less bitter taste compared to a regular hot brew.

There’s just one major problem – it takes anywhere from 12 to 24 hours to fully steep the grounds and allow the flavours to slowly be extracted using only cold water.