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Miscellaneous

How long does open shampoo last?

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ANSWER

Shampoo will last, open, forever. Archeologists have found open shampoo containers that had expiration dates of 734BC marked on them.

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An open container of shampoo will last a long time, but will slowly dry out to the point of not flowing or pouring out of its container, as the water in it dries out. It will dehydrate slowly.

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