Please take a look to the Blue-white HP 50g
It sure doesn't look engineer-like but school-like; but then, most of my customers for this product are in college!
There have been discussions as well about label contrast and readability - despite its looks, methinks this one scores high. Take a look at this close up. Sorry for not taking it out of the sleeve - I do not intend to use one myself. But for collectors: I have available as many as you want!
This is the presentation - exactly like the "normal" one. I have found it just in Spanish/Portuguese, while it could be done in any language, if volume was enough: