To the original purchaser that your flask is guaranteed to be free of defects in materials and workmanship, so that it will be repaired or replaced. It does not cover damage caused by misuse, accidents, ordinary wear and tear, or alterations to the product. We are not responsible for any incidental or consequential damage. However if you do experience any defective issues with your flask, please let us know and send us pictures so we can hopefully try and prevent or correct future problems.