Unknown Lot of clear prescription bottles

I put blue dye in the clear bottle so you could see the markings.... I have a lot of clear bottles. There are cc marks on the back of the bottle 20 cc 40 cc etc. The small bottles have what looks like a 3ii on the back, the middle size bottles have what looks like 3iv and the tallest has what looks like 3vi. I have tried detectiving on the internet but I need some help identifying these bottles. I found these with my other old bottles. Thanks.