Complete Set: 300 caps (292 Team caps + 7 ball caps + 1 cap with italian logo). 
The caps are not used on bottles but you can buy them at the news-stand and use to play "table soccer". Caps represents football teams and players of italian football league. It gives 9 different Football-teams with every 29-38 players. Composition caps:
Ball Caps (7) and Italian Logo (1) = 8 Caps (n° 1-8)
Amaranth-Grenade = 29 Caps (n° 9-37)
Black-Azure = 38 Caps (n° 38-75)
Red-Black = 38 Caps (n° 76-113)
Red-Blue = 30 Caps (n° 114-143)
Violet = 30 Caps (n° 144-173)
White-Black = 38 Caps (n° 174-211)
White-Celestial = 30 Caps (n° 212-241)
Yellow-Blue = 29 Caps (n° 242-270)
Yellow-Red = 30 Caps (n° 271-300)