Communal water, making merit

Part of being a good Buddhist is doing good for others, called making merit.  Even everyday people can do this with simple tasks.  

My favourite is the communal water system.  Everywhere you go, you see clay pots filled with drinking water to relieve travellers from the oppressive heat.  The pots are unfinished clay, so they perspire a bit.  This allows for evaporation which makes the pots, and hence the water, a bit cool. The pots are filled on a daily basis by people making merit.