Selling a few sneaky bottles of wine after 10pm has cost a Sydney bottle shop more than $25,000 in fines.

A Darling Harbour bottleshop is the first business to be prosecuted for breaching new drinking laws that ban the sale of takeaway alcohol after 10pm.

Harbourside Cellars at Darling Harbour was fined for six breaches of the ban on after-hours sales. Credit:Nick Moir

It comes as the state government conducts a review of the 10pm takeaways sales ban which was introduced last year as part of measures to combat alcohol-related violence following the deaths of teenagers Thomas Kelly and Daniel Christie.

Undercover officers caught Harbourside Cellars selling wine to customers and were able to buy alcohol themselves during a two-week operation in January and February this year.