"Consume within 30 days of opening" on the Soylent Tub. Nonsense?

Why would the tub suggest to consume Soylent within 30 days of opening? That is in addition to the official expiration date on the bottom.

Does it make any sense and what are the dangers? It is powder, not milk…

If opened in humid locations, the moisture may be enough to fuel microbial growth. The Soylent tub isn’t very big, and most likely will be consumed within 30 days anyway.

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I’d probably just stick it in the fridge or freezer and not worry too much.

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It is legal disclaimer. Actual lifetime of Soylent is same whether it is open or closed.