Iced coffee such as lemon coffee will usher in a huge consumer market.

In summer, many people like refreshing drinks, and lemon flavor is more popular. But behind the lemon juice coffee is the popularity of ice-drop coffee. Although espresso is less popular than iced coffee, it is growing rapidly: ColdBrew grew by 338.9% between 2010 and 2015, according to Mintel.

In addition to the Starbucks and Dawn Dole mentioned above, Peet'sCoffee has launched instant drinks with iced coffee, and there are more and more similar ready-to-drink drinks in supermarket WholeFoods. FirstBuild, the next GE team, has also designed a 10-minute device to quickly make iced coffee, which is crowdfunded at Indiegogo.

According to the American Coffee Association, 15 per cent of consumers have tried ice drop coffee, surpassing the other two types of coffee, nitrogen coffee and FlatWhite, with 10 per cent and 8 per cent respectively. If you include retail ready-to-drink ColdBrew coffee, the market for this category in the United States is about $2 billion.

Generally speaking, iced coffee such as lemon coffee will usher in a huge consumer market, which will be a new growth point for the coffee industry in the future.

Does that sound dark? According to the award-winning barista SamLewontin, it means to replace the tea in lemon tea with coffee. It's not that inconsistent. It is said that the meladose in the coffee releases the flavor of the coffee fruit and complements the citrus flavor in the lemon. Small companies are more flexible in launching new products and following trends. In New York, a number of boutique cafes or small cafes (including Stand Coffee, Everyman Espresso and Supercrown Coffee Roasters) have also launched this variety. Others started a small business of lemon juice coffee, pushing vintage cars to sell lemon juice coffee.