Bury it in the bottom of the trash and buy another one when you get home. No matter where you hide it, someone is bound to find it. They might decide to paint your room and remove everything from the inside. Or, a pipe might burst and cause part of the house to have all kinds of workmen with shop vacs and big fans moving stuff out of the way. Or, someone might just decide to snoop. Get rid of it. Remember, sometimes people go through the garbage bag because they realize they tossed something in there they actually need. Nowhere is safe.