Using this gift set is super easy. First, the trunk is great for storing all your Hogwarts - related items. You can attach the shoulder strap if you want to carry it around. The water bottle can be filled with your favorite drink. Just unscrew the lid, fill it up, and screw the lid back on tightly. The notebook is perfect for writing down your ideas, notes, or even creating your own spells. You can use the pencils with engraved spells to write in it. The keyring can be attached to your bag or keys. As for maintenance, keep the trunk away from excessive moisture to prevent the wood and leather from getting damaged. Wash the water bottle regularly with mild soap and warm water. Don't bend the pencils too much to avoid breakage. And keep the keyring away from sharp objects to prevent scratches.