I have used "milk boxes" for about 40 years, to store my "half-vast" 78rpm archive! Each one holds about 120 (or more...I have MANY of the old Fiberglas versions!) A full crate weighs 60-65 lbs. (which I can still lift...so far...?!). My only problem is trying to find "unclaimed" (I don't take them from grocery stores or dairies!) milk boxes, as fast as I purchase more 78's...?! Steven C. Barr