Coco-Cola held an advertising campaign at a university in China in 2006, where they had groups of students compete to be the best sales team by selling Coke on campus. With 20,000 thirsty students and temperatures reaching 30 degrees Celsius without air conditioning, the students used door-to-door delivery, prizes, coupons, and price promotions to drive sales of 20,000 bottles of Coke, generating 400,000 RMB in revenue for Coco-Cola. In addition to the financial benefits, Coco-Cola also received free delivery service, market research, a customer database, business plan assistance, and cheap labor from the student teams.