Cold brew coffee has exploded in popularity in recent years. According to Mintel, US sales grew 137% between 2016 to 2017, to $38 million. It’s also popular in the UK, where two-thirds of 18-24-year-olds say chilled coffee is an excellent alternative to sugary drinks.

The UK’s Solo calls themselves “masters of one,” in that they make one thing and seek to do it well – cold brew black coffee. Rather than work under the thumb of a supermarket or distributor, Solo decided to sell directly to consumers as 90% of coffee is consumed at work or home. By selling and shipping direct to consumers, Solo wants to save people time and money while also reducing the number of disposable cups used.

It’s also the UK’s first bag-in-box coffee with 15 servings. Solo’s cold brew goes through a filtration process and then vacuum sealed with nitrogen, which prevents oxidation and gives the Solo 3L box a 12-year shelf life.