Two decades, all from drinks beginning with the letter 'K'.
8 MIXED BEER / LAGER / CIDER BOTTLE CROWN CAPS - LETTER P - PORETTI, PEARL ETC
12 MIXED BEER / LAGER / CIDER BOTTLE CROWN CAPS - LETTER M - MAGNERS, MILLER ETC
10 MIXED BEER / LAGER / CIDER BOTTLE CROWN CAPS - LETTER L - LEFFE, LUXOR ETC.
11 MIXED BEER / LAGER / CIDER BOTTLE CROWN CAPS - LETTER R - RED STRIPE ETC
8 MIXED BEER / LAGER / CIDER BOTTLE CROWN CAPS - LETTERS N, O, Q - OPIHR ETC
8 MIXED BEER / LAGER / CIDER BOTTLE CROWN CAPS - PANACHE, NEWCASTLE BROWN ETC