The Puffco Peak Travel Glass allows you to make your Puffco Peak Vaporizer truly portable. With a patent-pending closure system, you can lock the mouthpiece when traveling to make sure that no water escapes. Water damage to your Peak base is not covered under warranty, this glass makes sure you won't have that problem and makes traveling even easier. Make sure to always ensure the seal is completely closed by flipping the glass upside down and checking for leaks. This is definitely one of our favorite Peak accessories if you have any questions about why we love it so much just ask!