I keep mine in the nightstand beside my bed, with the exception of a couple made of glass. They're out on a bookshelf because, unless you know what you're looking at, you can't tell right off the bat what they are. They make nice...decorations.
i think you need to talk to your parents in time they will come to understand that you are a adult hiding things from them wont work they will treat you like a kid if you do and they wont trust you
all joking aside it sounds like you need to show them that your an adult your parents will always treat you like one if you don't stand for your self
They live in my undies/bra drawer but I'm starting to obtain a lot of them and pretty soon will need to start like a box or something