Britain's largest coffee chain, part of Whitbread Plc (>> Whitbread plc), has grown rapidly on the back of rising demand for affordable coffee treats and aims to double sales to 2 billion pounds ($3.3 billion) by 2018, through expansion at home and abroad in places such as China.

Costa has more than 2,770 stores worldwide and has achieved 44 quarters of like-for-like sales growth in Britain, helping Whitbread shares rise 43 percent in a year.

In addition to increasing its store chain, Costa also plans to grow its Costa Express self-service machines arm, which give it a presence in places where a full store doesn't fit.

Costa Express, born in May 2011 after the acquisition of a company called Coffee Nation, has already grown from 877 self-serve machines to some 3,000, a target originally set for 2016 but reached after putting around 2,500 machines into UK retail stores and gasoline station forecourts, including those run by Royal Dutch Shell Plc .

Now the company wants to reach 6,000 machines in the UK by 2018, but to do so is relying on a new, smaller and more attractive machine named "Marlow" to grab the attention of coffee lovers in locations like offices, universities and hospitals.

"(The current machine) is fantastic in the forecourt arena. It's big, it's red, it's conspicuous, it generates impulse purchase at petrol (gas) stations, but it's just a bit too big, red and conspicuous for an office," Jim Slater, managing director of Costa Enterprises told an investor conference.

According to research group Allegra Strategies, consumers are drinking twice as many cups of coffee in the workplace as in coffee shops, while Costa has put the UK market at around 20,000 possible machines.

Costing 13,000 pounds to make, broadly in line with its predecessor, the new machine can churn out some 240 different drinks (versus 32 currently) and has a sleeker design courtesy of Italian design specialist Pininfarina (>> Pininfarina SpA), famous for designing cars such as the Ferrari Berlinetta.

The machine's control screen was developed by gaming specialists Atomhawk, who helped create Pottermore, the interactive site for Harry Potter fans, while customers will also smell coffee and hear coffee shop sounds mixed by eMixpro - a firm more used to working with likes of U2 and Katy Perry.

Costa already has nearly 30 of the new machines on trial in Britain, France, Denmark and the UAE as it tries to grow its international business too.

The current Costa Express machines make 6,000 pounds profit a year and the business contributed 7 million pounds of profit in 2012/13 before overheads and marketing costs.

The Costa business overall makes around a third of the 2 billion pounds in revenue chalked up by Whitbread, which also includes Brewers Fayre restaurants and Premier Inn hotels, where Whitbread aims to expand its UK rooms by 45 percent to 75,000 by 2018. ($1 = 0.6143 British pounds)

(Editing by David Holmes)

By Neil Maidment

Stocks treated in this article : Pininfarina SpA, Whitbread plc