We have many different ejuice flavors that require a unique label for each flavor. We use Maestro Label Designer to design and store our labels. This makes it very easy to store a full sheet of labels in the .pdf format for quick retrieval and printing whenever needed.
Be sure to print out your labels on plain paper to verify that everything is aligned and prints properly. This will save frustration and labels sheets. I always use Maestro Label Designer which makes the process almost fool proof. It is very convenient to store my creations online and to save a .pdf copy on my local hard drive for quick access.