Mini pavlovas can be stored for a certain period of time, but their texture may change over time due to exposure to air and moisture. They will stay good without whipped cream for 1 to 2 days in airtight container at room temperature in a cool, dry place. It's worth noting that regardless of the storage method, pavlovas are best enjoyed on the day they are made or shortly thereafter. The delicate meringue shells can become soft and lose their crispness over time, especially when exposed to moisture. If you're concerned about texture, you might consider assembling the pavlovas with toppings just before serving to ensure they remain as fresh as possible.