The ten most common items collected during the four initiatives represent 66.4% (627,285 items) of all the waste. Cigarette butts and filters are the most common waste as 257,717 items (27.3% of all the waste) were collected from the four initiatives. They are followed by unidentified plastic pieces (116,346, 12.3%), unidentified polystyrene pieces (59,625, 6.3%), plastic caps/lids drink (50,992, 5.4%), cotton bud sticks (42,364, 4.5%), straws and stirrers (24,564, 2.6%), shopping bags (22,668, 2.4%), glass and ceramic fragments (17,165, 1.8%) and <0.5L drink bottles (16,683, 1.8%). Apart from glass fragments, all these items belong to the artificial polymer materials category.