More than 15 million people are expected to pass through Houston's Hobby airport and IAH between June and late August and asks that passengers help keep things moving by doing their research before showing up for their flight.

TSA agents shared some of the strangest things they have found during airport checkpoints on their Instagram account. They include a lip stick stun gun, hidden weapons in common items like travel shampoo bottles, and even seven small snakes hidden inside a man's trousers.

Photos: Stranger things TSA agents have found

TSA recommends passengers unsure of whether to bring an item onto a plane can send them a photo through Twitter or Facebook and receive a response.

The agencies also uses their Instagram account to post photos showing what can and cannot be brought onboard.