To use this Harry Potter gift set, you can start by taking out the items from the trunk. The thermal bottle is great for keeping your drinks hot or cold. Just unscrew the gold lid and fill it up. The luxury pencils are perfect for writing down your magical ideas or taking notes. The flexi notebook is flexible and easy to carry around. And you can use the keyring to decorate your bag or keys. When it comes to maintenance, for the thermal bottle, clean it regularly with warm soapy water. Keep the pencils in a dry place to prevent the tips from breaking. For the notebook, avoid getting it wet. And the keyring can be wiped with a soft cloth to keep it shiny. Just handle the trunk gently to avoid any scratches on the wooden surface and the gold - printed crest.