Replying to Parents found an empty flask...

Hey
Well no one here knows me so you wouldn't really know my parents. Their not really strick but if they are about stuff like drinking and drugs. They let me stay out until 3-4 as long as I tell them when I get home. I'm only 16 so drinking is still illegal. I don't drink a whole lot but like to from time to time (ever two weeks?) Anywho I went to a party a month ago and never left the empty flask there, I shoved it in my bag along with some other liqour I never drank. So I went home and everything was good and unpacked my bag and shoved it in my closet under some stuff to hide it abit.

Last friday I went away with the senior volley ball team for a tournoment and came home and found out that she cleaned out my room, and the bed was made and resting on my pillow was a empty flask. I just sort of stood there looking at it in shock. Before I left i took the other stuff and hid it in another part of my house but forgot about the flask because soemthing covered it up. Anyway she was like do you have anything to say and I was like yah i'm sorry but thats it. What am I soposed to say? Then she asked me questions like if my g/f drank where i got it when i had my last drink etc.

Anyway what am I soposed to do or say to get out of this one? Help me please because they will probly take something away like ski gear or wrose my iPod Nano I just ordered. If they do that i'll get really fucking pissed sence I payed for all of it, but none the less help.
-aaron