This is example for typography design. I like that design since it is so creative typeface using the glass shape for "g" even though the design is really simple. I've got inspiration when I do assignments for typography design class.
These use of multiple z's which is often placed with the idea of sleeping, help emphasize the word Lazy. Even though lazy isn't spelled with multiple Z's the reader can figure out what the word is due to the subscript z's.