Over the next month or so, travellers flying out of Changi Airport's Terminal 3 can enjoy free cocktails at DFS Wines and Spirits Duplex.

Till June 30, just head to the second floor of the shop, where the Long Bar by Raffles is, to try three drinks inspired by familiar Singapore flavours.

The cocktails, available from noon to 1am daily, are Chop Chop Lah, an Absolut vodka-based drink inspired by chicken rice; Shiok Date, a Jack Daniel's Single Barrel whisky-based drink inspired by cheng tng, a sweet soup; and Kiasu Kaya, a Ron Zacapa rum-based take on the coconut jam.

The giveaway is part of the DFS Cocktail Festival, which celebrates the one-year anniversary of the 11,000 sq ft duplex, the DFS Group's largest store. Also on the programme is a schedule of guest appearances by top bartenders.

The three locally themed drinks are concocted by Jeremy Chua, formerly the head bartender at 28 Hong Kong Street, the cult Chinatown bar, and currently the creative associate at Proof & Company, a liquor distributor and bar consultancy.

Chua, who took inspiration from staple Singaporean dishes, says he was conscious about including some lesser-known but traditional Chinese ingredients such as wolfberries and dates. Both feature in Shiok Date.

"These are ingredients that are often overlooked, but form an important part of our culinary heritage," he says.

While his creations will be available throughout the six-week festival starting this weekend, on other Fridays and Saturdays from 5.30 to 7.30pm, other guest bartenders will take turns making Singaporeinspired cocktails.

For example, next weekend, you can sample free tipples from Amoy Street's Jigger & Pony and on June 10 and 11, drinks from Manhattan, a bar at Regent Singapore.

Keong Saik Street's secret bar The Library has shifts on June 17 and 18.

Additionally on June 3 and 4, there will be a champagne cocktail party hosted by Veuve Clicquot.

One new creation you can look forward to is the Fatty Old Fashioned, put together by bartender Byron Tan of Smoke & Mirrors, the rooftop bar of National Gallery Singapore. Tan's guest shift will take place on June 24 and 25.

The drink is an amalgamation of the classic Old Fashioned and the breakfast staple nasi lemak.

Using a 23-year-old Ron Zacapa rum as a base, the drink features a dense coconut cream, with ikan bilis and peanut powder as garnish.