I plan to buy a bottle of whiskey for my birthday, which is exactly 9 days from today. I want to buy the whiskey now, because it is on promotion. However, I hesitate, because I don't want it to expire or go bad in some way until my birthday. If I keep it unsealed and stored in my closet for 9 days, nothing will happen to it, right? Also, will the warm summer temperature in my room affect it in some way? I also have to mention that the bottle of whiskey is also closed in a metal tube, which I hope is good. Thank you.