Got an extra shower cap you nabbed from a hotel stay? The plastic caps can be used for more than just keeping your hair dry. Wrap the bottom of your shoes with shower caps; they'll create barriers that prevent the germs, bacteria and dirt that live on the bottom of your shoes from getting on your clean clothes in your suitcase. You can also create a mini greenhouse for seedlings; just cover the container that's holding freshly planted seeds, and the cap will keep it warm and moist to create the perfect growing environment.