How much can this teenager eat?

Really? My oldest is now 15 years old and I think he has a hole in his stomach. The kid never stops eating. He just got home from school 30 minutes ago and he's already raided the pantry 3 times. Is this what is to come with my next child (currently 13)? He already eats just as much as his big brother... but in 2 years is he going to be eating even more? I'm getting ready to rename my pantry the "Teenager Wasteland" because that's what the two of them are doing to it, they are turning it into a wasteland. *sigh*