For 0.50USD you can fill-up your thermos. People carry hot water and a cup with a metal straw so they can brew herbal tea on-the-move. More popular outside of BA, but very cool!

Camera model		iPhone 4
Shutter speed		1/123
Aperture		f/2.6
Exposure		Normal program
Focal length		3.85mm
Flash		Off
Metering		Pattern
Brightness		6.0
ISO sensitivity		80
Latitude		34.577833˚ S
Longitude		58.4155˚ W
Altitude		23.90 m
Location		Buenos Aires, Buenos Aires, Argentina

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