• The moisture in the air on coming in contact with the cold surface of the tumbler condenses in the form of droplets of water

  • The outer surface of the tumbler shows hygroscopic effect

  • Water from inside oozes out through minute porous wall of the tumbler

  • Both (b ) and (c )


The moisture in the air on coming in contact with the cold surface of the tumbler condenses in the form of droplets of water