How long do diet powder mixes and drink mixes last?
Short answer: Diet powder mixes and drink mixes keep 18–24 months (1–3 months once opened) in the pantry.
Storage chart
| Pantry |
|---|
| 18–24 months; 1–3 months (after opening) |
Fridge at 40°F (4°C) or colder, freezer at 0°F (−18°C). Freezer times are for best quality; food kept frozen stays safe indefinitely.
Keep it longer
Keep the fridge at 40°F (4°C) or colder and the freezer at 0°F (−18°C). Write the date on containers when you open or cook something.
Common questions
How long do diet powder mixes and drink mixes last at room temperature?
18–24 months (1–3 months once opened) in a cool, dry pantry.
How can I tell if diet powder mixes and drink mixes have gone bad?
Throw them out if you see mold, a slimy texture, an off smell or an odd color. For anything perishable, go by the storage time rather than smell: bacteria that cause food poisoning don't usually change how food looks or smells.
More beverages
Source: USDA FoodKeeper data (USDA Food Safety and Inspection Service). Updated 2026-10-13. General information, not medical advice. When in doubt, throw it out.