Hmmm...freezing doesn't sound like the best option.

I have a cake that's due on the 6th. I want to make some flowers that I've never done before. I thought maybe I could practice them ahead of time and if it goes well...use them on the cake? I know It's lazy, but she's getting it for practically nothing (see my pricing thread...

) and if I make the icing and color it, I really don't want to waste it...ya know? How long would they last in an air tight container at room temp or in the fridge?
Thanks!