Power up reward

I think it would be great if when we received those 2hr rewards we had the option on when to activate them, or even to store them if possible. There are sometimes when I check in to play a quick game and I get them and don't have the time to use them. I'm at level1,856 were I need all the help I can get. Especially when a normal level takes over 10+ tries to pass ( starting to get frustrated) so it would like a say in how and when I chose to use those special power ups.