Using this Harry Potter Quidditch gift set is easy. You can use the thermal bottle to carry hot or cold drinks on your trips. Just unscrew the top, fill it up, and screw the lid back on tightly. The notebook is great for taking notes at school or writing down your own Harry Potter stories. Use the mini broom pencil and wand pen to add a bit of magic to your writing. And don't forget to attach the keychain to your keys for a fun look. When it comes to maintenance, keep the thermal bottle clean by washing it regularly with warm soapy water. For the notebook, avoid getting it wet to prevent the pages from warping. The mini broom pencil and wand pen don't need much special care, just keep them away from extreme heat or cold. As for the trunk, wipe it down with a dry cloth every now and then to keep it looking nice. And be careful not to over - stuff the trunk to avoid damaging the clasp or handles.