Cleaner than the school pass, and by clipping it to their shirt sleeve they won't leave it anywhere. - For middle school, make up laminated tags (bathroom pass, office pass, nurse pass, library pass, etc.) and attach them to lanyards that can be worn around student's neck - easier to see.
This blog has great ideas for learning expectations and rules at the beginning of the year-she starts the year with empty shelves, then adds them as the students learn how to use them correctly. I have done this and it really helps