backdrop background berlin cold floating floe floes form forms frost frozen germany ice ice floe icy pattern patterns river sheet of ice spree structure structures texture textures winter alcohol bottle bucket Champagne green liquid liquor outside tub blue crack crevasse danger glacier mountain norway slip slippery lake nature seasons snow tree white flowers freeze frosted iced leaves plant snow branches landscape sky tree trees avenue forest freezing road straight tarmac blood chilled coldpack compress gel figure peak shadow tall valley walker