The middle is the "narrow style" CD 145 HGCO. I couldn't find my aqua one, so I had to use this purple one! Actually, I have seen more in purple than aqua! The "narrow style" has much straighter sides as you can see, and is about 1/4" smaller in diameter than the standard HG PETTICOATs.
Yes, the one on the left is "the" White Milk beehive, and the one on the right is a neat bubbly semi-opaque power blue color.