Kitchenware Unlimited is where Peter and Chris go to register gifts in Vermont after Peter asks Chris to marry him in "Fresh Heir" so that he can still have access to the Pewterschmidt family fortune after Carter makes him his sole heir.
As Peter picks out expensive gifts, Chris gets annoyed with him checking out another boy's butt while they pass by. Peter protests that despite being Chris' future husband as well as his dad, he is still a man.