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firstly they fizz. after 3 days a paste forms on top of the shell parts that are out of the vinegar, and around the liquid level of the bowl.

we removed the shells from the vinegar and compared them with untouched shells.

the vinegar shells were crumbly. we could break them with our hands, compared to the untouched shells which were still hard and shattered when dropped on the ground.

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14y ago

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