As liquid creamers age, they may thicken. This "maturity" can be caused by temperature fluctuations that cause fats to solidify or oils to separate.
Most liquid dairy creamers are at their best for 7 to 14 days after opening, even if refrigerated. "Mature" creamers (those kept 2–4 weeks) may still be safe but often show physical changes. mature wet creamers
While not a technical grade, "mature" often describes liquid creamers that have been opened for an extended period or are past their peak freshness. As liquid creamers age, they may thicken
If a creamer is too "mature" (spoiled), it will exhibit clear warning signs: As liquid creamers age
During 2012, the Aphasia Alliance worked together to draw up some ‘top tips’ about communicating with people with aphasia.