Howdy all,
Hope this is the right flair.
Yesterday I discovered one of our glass Tupperware containers in the hatch of my wife’s car and the lid is sucked in on itself.
The lid has four clips that snap under the lip of the glass and it’s air tight I would assume. It has remnants of her buffalo chicken chili in it. That has dairy in it.
It’s also been relatively warm here until yesterday when I discovered it. It was 15 degrees F difference.
Thanks in advance for your answers.
In: Biology
In addition to all the right answers, it isn’t necessary that the food was hot when it went into the container.
The air inside may have started cold and got heated in the hatch of the car. These containers withstand pressure from the outside well, but not from the inside.
The heated air expanded, lifted the lid until a tiny gap opens and some of the air gets out. When outside and thus inside temperatures fall, the air cools and because now there’s less of it, the lid gets pressed on by lower pressure inside and higher pressure outside.
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