We all know not to lock our luggage when travelling by plane, just in case security needs to check it.
This makes me feel a tad vulnerable because it would be so quick and easy for someone to zip open my bag and grab something.
My sister gave me a suggestion for a cheap and simple deterrent: multipurpose self-locking plastic ties.
Wrap these around the suitcase zipper heads to keep them closed. If security decides to search your luggage, they can cut the ties. It does however, make it just a little more difficult for a thief to get in.
You can find these ties for under $3.00 in most hardware stores.