Where the six o'clock swill generation congregated around frosty beer taps, Sydney taps are now running hot with caffeine. The newly redesigned and reopened Single O in Surry Hills has installed what it says is a world-first, self-serve batch brew prototype.

Pour-your-own coffee isn't new. American diners have been pushing the airpot for decades.

But Single O lets customers decide between, say, Ethiopian, Colombian and Kenyan coffee in the same way bar customers might choose a craft beer.

Single O points to black coffee consumption in their cafe rising from 2 to 3 per cent of sales in 2003, to 23 per cent today. Just be ready to DIY.

Open Mon-Fri 6.30am-4pm, Sat 7.30am-3pm, Sun 8am-3pm.

60-64 Reservoir Street, Surry Hills, 02 9211 0665, singleo.com.au