How long do Diet powder mixes and drink mixes last after opening?

Updated 2026-08-07 · Free · No sign-up

Once opened, Diet powder mixes and drink mixes keep about 1–3 months in the pantry. Unopened, they keep about 18–24 months.

Source: USDA FoodKeeper v128 · Category: Beverages

How long Diet powder mixes and drink mixes keep

SituationKeeps for
Unopened · pantry18–24 months
Opened · pantry1–3 months

Only situations with a published figure are listed. A blank isn't “forever” — it means no reliable number is published for it.

Storage

How to tell if Diet powder mixes and drink mixes has gone bad

These are the general spoilage signs for beverages — never taste something to test it. When in doubt, throw it out.

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FAQ

How long do Diet powder mixes and drink mixes last after opening?

About 1–3 months in the pantry, according to USDA FoodKeeper v128.

Do Diet powder mixes and drink mixes need to be refrigerated after opening?

Diet powder mixes and drink mixes are shelf-stable at room temperature: cool, dry pantry, sealed — refrigerating after opening is optional and mainly preserves quality. Refrigerating it mainly preserves quality rather than safety.

How can you tell if Diet powder mixes and drink mixes are bad?

Look for: Sour or off smell; Cloudiness, sediment, or curdling; Fizzing in a still drink, or a swollen carton or can; A bitter or 'off' first sip. Never taste something to test it — when in doubt, throw it out.

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