I have a plastic cup with lid full of catnip hidden in an upper cabinet. This is very dangerous stuff with my cat. If you open it up for her to inspect, the paws go in, and catnip spews out.

If I put a small cat toy, like a foam ball, or stuffed mouse in it for a while to gather up the smell, then give her the toy. She'll rip it to shreds until there's nothing but pieces and stuffing laying around the floor. Meow!