The Urban Environment and daily newspaper Helsingin Sanomat have organised a bottle collecting campaign in Kaivopuisto park each year on Vappu (1 May) since 2005. For every 20 bottles of sparkling wine you collect, you will receive one cinema ticket. In this way you can even earn enough cinema tickets for the entire year! The park has two collection points. Each year approximately 30,000 bottles are collected as part of this fun campaign.