Four in 10 (39 per cent) coffee drinkers are so particular about their morning brew they refuse to drink one made by anyone else - even professional baristas. <br /><br />A study, of 2,000 caffeine fans, found they are typically specific about the temperature (39 per cent), type of milk used (33 per cent) and the cup it’s served in (31 per cent). <br /><br />And while 36 per cent are particular about the type of coffee used - from fine grind to instant granules - 17 per cent go as far as fussing over the type of bean. <br /><br />Because of this, one in five (19 per cent) have refused to drink beverages others have made for them, even those prepared by baristas in coffee shops. <br /><br />It also emerged one in 10 (nine per cent) admitted they are a coffee snob. <br /><br />Despite this, 31 per cent think coffee culture should be less serious and 38 per cent want to be more playful with their drinking habits. <br /><br />The research was commissioned by OREO, which has recruited etiquette expert and the most particular man in town, William Hanson, as its ‘Creative Director’ of a coffee-inspired shoot to launch its new limited edition Vanilla Latte Flavour cookies. <br /><br />William can be seen in the behind-the-scenes content carefully calculating the correct ratio of crumbs, measuring the height of the cookie, and instructing the photographer to get the perfect shot. <br /><br />Commenting on the shoot, he said: “As a connoisseur, I know how good coffee should be enjoyed - and there’s no difference to enjoying a coffee-inspired cookie. <br /><br />"I knew I had to bring the height of sophistication and decorum to the photo shoot - from cookie crumbs to coffee beans, everything had to be paired to perfection." <br /><br />The research also found 23 per cent would like to be more experimental with coffee than they currently are. <br /><br />To make their caffeinated drinks more fun, 30 per cent have or would like to add flavoured syrups, while 26 per cent opt for whipped cream on top. <br /><br />A fifth are keen to have their usual coffee order as an iced alternative, according to the OnePoll.com data. <br /><br />When it comes to flavours, 14 per cent feel they’re the first to try a new offering. <br /><br />With vanilla (26 per cent), chocolate (25 per cent) and salted caramel (23 per cent) the most popular. <br /><br />Becky Latcham, at OREO UK, said: “Coffee culture in the UK can often be very serious, with consumers having a preference over everything from the type of milk to the type of bean. <br /><br />"We wanted to bring a touch of playfulness to the coffee break with our new limited-edition flavour. <br /><br />"With vanilla topping the list of Brits’ favourite coffee flavour pairings, we knew it would delight cookie and coffee fans alike."