(Reuters) - Shares of soft drink bottler Coca Cola HBC AG fell 4 percent on Thursday after it warned of higher finance costs and weak consumer spending in several of its markets this year.The company - which bottles and sells Coca-Cola Co drinks in 28 countries, mostly in Europe - said costs related to refinancing an €800-million (£703 million) bond, which matures in June 2020, may double this year and cross currency fluctuations would hurt its core profit by 50 million euros.It also said..