Refill pen

The user needs to refill the pen after the specific limit for using it has been reached. Each pen has a unique refill ink. For example, if the user has a silver pen, he has to refill it with silver ink, not with golden or any other. So, when it comes to refilling, make sure to choose the right ink that aligns with the category of your pen. The user can find all their purchased pens and refill ink under inventory.